# Top 210 Most Asked Boat and Stream Questions [ 100% FREE ]

Navigating through competitive exams requires a clear understanding of various topics, one of which is boat and stream questions. The world of boats and streams is not just about boats moving on water; it’s about understanding the intricate dance between the boat and the water’s flow. And in the realm of competitive exams, this dance translates into boat and stream questions that challenge, intrigue, and test the understanding of aspirants.

One of the primary reasons behind the popularity of boat and stream questions in Government exams is their real-world applicability. Imagine a boat navigating the waters of a stream. The way it maneuvers against or along the stream can be mathematically modeled, and this forms the basis of boat and stream questions. Given their relevance, it’s no surprise that these questions often make an appearance in the quantitative aptitude section of various exams, carrying a weightage of 1-3 marks.

But before diving headlong into boat and stream questions, it’s vital to grasp the fundamental concepts associated with boats and streams. At the heart of these questions lies the boat and stream formula. This formula, crucial for solving boat and stream questions, breaks down the dynamics of boats in different water conditions. And for those eager to delve deep into the topic, our boat and stream formula pdf offers a detailed look into the mathematical intricacies of the concept.

Understanding boats and streams is about more than just formulas; it’s about visualizing various scenarios. Consider a boat moving against the flow of water. This is termed as ‘upstream’. The speed at which the boat moves in this scenario gives us the upstream speed. On the other hand, when the boat aligns with the water’s flow, moving with the current, it’s called ‘downstream’, and we measure its net speed as the downstream speed. And of course, there are times when waters are calm, and we’re dealing with ‘still water’ scenarios, where the water speed is zero.

For many aspirants, especially those who prefer reading in Hindi, we’ve curated boat and stream questions in Hindi. This ensures that everyone, regardless of their language preference, has equal access to this crucial topic. Moreover, our boat and stream questions pdf provides a handy compilation of these questions, making it easier for aspirants to practice and master the topic.

In conclusion, boat and stream questions are not just another topic; they are a doorway to understanding the beautiful interplay between motion and resistance, between man-made vessels and nature’s flow. Whether you’re seeking the boat and stream formula or practicing with our boats and streams problems, remember that each question brings you one step closer to mastering this vital topic for your exams.

## Top 210 Most Asked Boat and Stream Questions

 121. The downstream speed of the boat is two times the upstream speed of the boat. The boat covers 240 km downstream and 210 km upstream in 11 hours. If the speed of the boat in still water is decreased by 20%, then find the total distance covered by the boat in still water in 5 hours?नाव की धारा के अनुकूल गति, नाव की धारा के प्रतिकूल गति की दुगुनी है। नाव 11 घंटे में 240 किमी धारा के अनुकूल और 210 किमी धारा के प्रतिकूल तय करती है। यदि स्थिर जल में नाव की गति 20% कम हो जाती है, तो स्थिर जल में नाव द्वारा 5 घंटे में तय की गई कुल दूरी ज्ञात कीजिए?A. 300 kmB. 240 kmC. 450 kmD. 180 kmE. None of these Option “D” is correct.Upstream speed of the boat=xDownstream speed of the boat=2x240/2x+210/x=11660=22x x=30Speed of the boat=(30+2*30)/2=45 kmphSpeed of the boat is decreased by 20%=45*80/100=36 kmphRequired distance=36*5=180 km 122. A boat covers 150 km upstream in 5 hours and the same boat covers 120 km in still water in 3 hours.If the speed of the boat in still water is increased by 5 km/hr, then find the downstream speed of the boat. एक नाव 5 घंटे में धारा के प्रतिकूल 150 किमी की दूरी तय करती है और वही नाव स्थिर जल में 120 किमी 3 घंटे में तय करती है। यदि स्थिर जल में नाव की गति में 5 किमी/घंटा की वृद्धि कर दी जाती है, तो नाव की धारा के अनुकूल गति ज्ञात कीजिए।A. 60 km/hrB. 45 km/hrC. 55 km/hrD. 30 km/hrE. None of theseOption “C” is correct.The actual upstream speed of the boat = 150/5 = 30 km/hrThe actual speed of the boat in still water = 120/3 = 40 km/hrThe actual speed of the stream = 40 – 30 = 10 km/hrThe new speed of the boat in still water = 40 + 5 = 45 km/hrTherefore, the new downstream stream speed of the boat = 45 + 10 = 55 km/hr 123. The sum of the speed of the boat in still water and stream is 18 kmph. If the speed of the boat in still water is decreased by 20% and the speed of stream is increased by 50%, then the boat takes to cover 225 km upstream in 30 hours, then find the speed of stream?स्थिर जल में नाव और धारा की गति का योग 18 किमी प्रति घंटा है। यदि स्थिर जल में नाव की गति 20% कम हो जाती है और धारा की गति 50% बढ़ जाती है, तो नाव 30 घंटे में धारा के प्रतिकूल 225 किमी की दूरी तय करती है, तो धारा की गति ज्ञात कीजिए?A. 3 kmphB. 5 kmphC. 6 kmphD. 2 kmphE. None of theseOption “A” is correct.Speed of stream = xSpeed of boat in still water = 18 – x225/((18 – x) * 80/100 – (x * 150/100)) = 307.5 * 100 = 1440 – 80x – 150xx = 3 kmph 124. Ratio of the speed of the boat in still water to speed of stream is 4:1 and the boat covers 120 km upstream and downstream in 8 hours. If the speed of the boat in still water is increased by x km/hr and then the boat covers 200 km in still water in 5 hours, then find the value of x?स्थिर जल में नाव की गति से धारा की गति का अनुपात 4:1 है और नाव धारा के प्रतिकूल और धारा के अनुकूल 120 किमी की दूरी 8 घंटे में तय करती है। यदि स्थिर जल में नाव की गति x किमी/घंटा बढ़ा दी जाती है और फिर नाव स्थिर जल में 200 किमी की दूरी 5 घंटे में तय करती है, तो x का मान ज्ञात कीजिए?A. 12 km/hrB. 8 km/hrC. 10 km/hrD. 16 km/hrE. None of theseOption “B” is correct.Let the speed of the boat = 4xAnd the speed of the stream = 1x120/(4x+1x) + 120/(4x-1x) = 8120/5x + 120/3x = 824/x + 40/x = 864/8 = xx = 8 km/hrThe speed of the boat in still water = 4 * 8 = 32 km/hrThe new speed of the boat in still water = 200/5 = 40 km/hrx= 40 – 32 = 8 km/hr 125. Ratio of the speed of the boat and stream is 4:1 and the boat travels 252 km upstream in 7 hours. If the speed of the boat in still water is increased by 25%, then find the time taken by boat to cover 360 km downstream and 240 km upstream?नाव और धारा की गति का अनुपात 4:1 है और नाव 7 घंटे में धारा के प्रतिकूल 252 किमी की यात्रा करती है। यदि स्थिर जल में नाव की गति में 25% की वृद्धि की जाती है, तो नाव द्वारा धारा के अनुकूल 360 किमी और धारा के प्रतिकूल 240 किमी की दूरी तय करने में कितना समय लगता है?A. 10 hoursB. 7 hoursC. 9 hoursD. 8 hoursE. None of theseOption “A” is correct.The upstream speed of the boat=252/7=36 km/hrThe speed of the boat=36*4/(4-1)=48 km/hrThe speed of the stream=48-36=12 km/hrThe speed of the boat in still water is increased by 25%=48*125/100=60 km/hrNew upstream speed of the boat=60-12=48 km/hrNew downstream speed of the boat=60+12=72 km/hrRequired time=360/72+240/48=5+5=10 hours 126. A boat covers 24km upstream and 20km downstream together in 7.25 hours. The ratio of the speed of the boat in still water to the speed of the stream is 5: 3. Find the time taken by boat to cover a distance of 38km in upstream, if the speed of the boat in still water is increased by 10%.एक नाव 7.25 घंटे में एक साथ 24 किमी ऊर्ध्वप्रवाह और 20 किमी अनुप्रवाह को तय करती है। स्थिर पानी में नाव की गति तथा धारा की गति का अनुपात 5 : 3 है। ऊर्ध्वप्रवाह 38 किमी की दूरी तय करने के लिए नाव द्वारा लिया गया समय ज्ञात करें, यदि स्थिर पानी में नाव की गति 10% बढ़ जाती है।A. 5 hoursB. 5.2 hoursC. 7 hoursD. 7.6 hoursE. None of theseOption “D” is correct.Speed in still water = 5x and Stream speed = 3x24/(5x – 3x) + 20/(5x + 3x) = 7.25=> x = 2Speed in still water = 10kmph and Stream speed = 6kmphNew speed in still water = 10 * 1.10 = 11kmphTime taken = 38/(11 – 6) = 7.6 hours 127. A boat covers 150 km downstream in 2 hours 30 minutes and the same boat cover 120 km upstream in 3 hours. If the speed of the boat in still water is decreased by 20%, then find the time taken by the boat to cover 200 km downstream.एक नाव धारा के अनुकूल 150 किमी की दूरी 2 घंटे 30 मिनट में तय करती है और वही नाव धारा के प्रतिकूल 120 किमी 3 घंटे में तय करती है। यदि स्थिर जल में नाव की गति 20% कम हो जाती है, तो नाव द्वारा धारा के अनुकूल 200 किमी की दूरी तय करने में लगने वाला समय ज्ञात कीजिए।A. 2.5 hoursB. 8 hoursC. 4 hoursD. 5 hoursE. None of theseOption “C” is correct.The upstream speed of the boat = 120/3 = 40 km/hrThe time taken by the boat to cover 150 km downstream in hours = 2.5 hoursThe downstream speed of the boat = 150/2.5 = 60 km/hrThe speed of the boat in still water = (60 + 40)/2 = 100/2 = 50 km/hrThe speed of the stream in still water = 60 – 50 = 10 km/hrThe new speed of the boat in still water = 50 * (100 – 20)/100 = 50 * 80/100 = 40 km/hrThe new downstream speed of the boat = 40 + 10 = 50 km/hrRequired time = 200/50 = 4 hours 128. A boat covers 160 km downstream and 112 km upstream in 12 hours and the ratio of the speed of the boat in still water to the speed of the stream is 3:1. If the speed of the boat in still water is increased by 25%, then find the new downstream speed of the boat?एक नाव धारा के अनुकूल 160 किमी और धारा के प्रतिकूल 112 किमी की दूरी 12 घंटे में तय करती है और स्थिर जल में नाव की गति से धारा की गति का अनुपात 3:1 है। यदि स्थिर जल में नाव की गति में 25% की वृद्धि की जाती है, तो नाव की धारा के अनुकूल नई गति ज्ञात कीजिए?A. 36 km/hrB. 54 km/hrC. 38 km/hrD. 42 km/hrE. None of theseOption “C” is correct.[160/(3x + x)] + [112/(3x – x)] = 12160/4x + 112/2x = 1240/x + 56/x = 12x = 96/12x = 8The downstream speed of the boat = (3 + 1) * 8 =  4 * 8 = 32 km/hrThe upstream speed of the boat = (3 – 1) * 8 = 2 * 8 = 16 km/hrThe actual speed of the boat in still water = (32 + 16)/2 = 48/2 = 24 km/hrThe new speed of the boat in still water = 24 * 125/100 = 30 km/hrThe new downstream speed of the boat = 30 + 8 = 38 km/hr 129. A boat covers 120 km along with stream in x hours. Ratio of the speed of boat in still water to current is 3:1. If the speed of boat is increased by 20% and covers 92 km downstream in (x – 2) hours, then find the time taken by the boat covers 100 km against stream.एक नाव x घंटे में धारा के साथ 120 किमी को तय करती है। ठहरे हुए पानी में नाव की गति से धारा की गति का अनुपात 3:1 है। यदि नाव की गति में 20% से वृध्दि की गई है और यह (x-2) घंटे में 92 किमी धारा-अनुकूल को तय करती है, फिर धारा के विरुद्ध 100 किमी को तय करने में नाव के द्वारा लिए गए समय को ज्ञात कीजिए।A. 8 hoursB. 12.5 hoursC. 10 hoursD. 20 hoursE. None of theseOption “C” is correct.Boat speed = 3aCurrent speed = a120/4a = x30 = ax92/((3a * 120/100) + a) = (x – 2)20 = a (x – 2)20 = ax – 2a20 = 30 – 2aa = 5Speed of boat = 3 * 5 = 15Required time = 100/(15 – 5) = 10 hours 130. A boat covers 264 km along the stream in 6 hours and the same boat covers 252 km against the stream in 9 hours. If the speed of the boat is increased by 16.67%, then find the time taken by the boat in still water to cover 336 km?एक नाव 6 घंटे में धारा के साथ 264 किमी की दूरी तय करती है और वही नाव 9 घंटे में धारा के विपरीत 252 किमी की दूरी तय करती है। यदि नाव की गति में 16.67% की वृद्धि की जाती है, तो स्थिर जल में नाव द्वारा 336 किमी की दूरी तय करने में लिया गया समय ज्ञात कीजिए।A. 8 hoursB. 3 hoursC. 6 hoursD. 7 hoursE. None of theseOption “A” is correct.Downstream speed of the boat=264/6=44 kmphUpstream speed of the boat=252/9=28 kmphSpeed of the boat=(28+44)/2=36 kmphSpeed of the boat is increased by 16.67%=36*7/6=42 kmphRequired time=336/42=8 hours