# 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

 151. The speed of the boat in still water is four times the speed of the stream and the boat covers 150 km along with the stream and 120 km against the stream in 7 hours, then find the speed of the boat in still water?स्थिर जल में नाव की गति धारा की गति का चार गुना है और नाव धारा के साथ 150 किमी और धारा के विपरीत 120 किमी 7 घंटे में तय करती है, तो स्थिर जल में नाव की गति ज्ञात कीजिए?A. 50 km/hrB. 20 km/hrC. 30 km/hrD. 40 km/hrE. None of these Option “D” is correct.Let the speed of the stream = xAnd the speed of the boat in still water = 4x150/(4x+1x) + 120/(4x-1x) = 7150/5x + 120/3x = 7 30/x + 40/x = 770 = 7xx = 10The speed of the boat in still water = 4*10 = 40 km/hr 152. A boat covers 120 km downstream and 50 km upstream in 9 hours and the same boat covers 30 km upstream and 150 km downstream in 8 hours. Find the speed of the boat in still water? एक नाव 9 घंटे में 120 किमी धारा के अनुकूल और 50 किमी धारा के प्रतिकूल की दूरी तय करती है और वही नाव 8 घंटे में 30 किमी धारा के प्रतिकूल और 150 किमी धारा के अनुकूल की दूरी तय करती है। स्थिर जल में नाव की गति ज्ञात कीजिए?A. 20 km/hrB. 45 km/hrC. 30 km/hrD. 15 km/hrE. None of theseOption “A” is correct.Let the downstream speed of the boat = x km/hrAnd the upstream speed of the boat = y km/hr120/x + 50/y = 9 —(1)150/x + 30/y = 8 —(2)From (1) and (2),360/x + 150/y = 27– 750/x – 150y = – 40390/x = 13x = 30Sub x=30 in equation (1)120/30 + 50/y = 950/y = 9 – 4y = 50/5y = 10The speed of the boat in still water = (30 + 10)/2 = 40/2 = 20 km/hr 153. The ratio of the speed of the boat upstream to the speed of the stream is 4:1. If the boat can travel a distance of 216 km downstream in 18 hours, then find the speed of the boat.धारा के प्रतिकूल नाव की गति से धारा की गति का अनुपात 4:1 है। यदि नाव धारा के अनुकूल 216 किमी की दूरी 18 घंटे में तय कर सकती है, तो नाव की गति ज्ञात कीजिए।A. 10 km/hrB. 8 km/hrC. 12 km/hrD. 20 km/hrE. None of theseOption “A” is correct.Let the speed of the boat upstream and the speed of the stream are 4x and x respectively.Then Downstream speed of the boat = 4x + x + x = 6xThe downstream speed = 216/18 = 12 km/hr6x = 12x = 2 km/hrRequired answer = 6x – x = 5x = 5 * 2 = 10 km/hr 154. The time taken by a man to row 120 km along with the stream is one-third of the time taken by the man to row against the stream. Find the speed of the boat in still water, if the speed of stream is 10 km/hr?एक व्यक्ति द्वारा धारा के साथ 120 किमी की दूरी तय करने में लिया गया समय, व्यक्ति द्वारा धारा के विपरीत लिए गए समय का एक तिहाई है। स्थिर जल में नाव की गति ज्ञात कीजिए, यदि धारा की गति 10 किमी/घंटा है?A. 24 km/hrB. 20 km/hrC. 18 km/hrD. 14 km/hrE. None of theseOption “B” is correct.Let us take the speed of the boat in still water be x km/hr,120/(x + 10) = (1/3)*(120/(x – 10))x + 10 = 3x – 302x = 40x = 20Speed of the boat in still water = 20 km/hr 155. Distance travelled by boat in upstream is 125% of the distance travelled by the boat in downstream and the time taken by the boat to cover this downstream and upstream distance is 4 hours and 7.5 hours respectively. If the speed of the current is 5 km/hr, then find the speed of the boat in still water.धारा के प्रतिकूल नाव द्वारा तय की गई दूरी धारा के अनुकूल नाव द्वारा तय की गई दूरी का 125% है और नाव द्वारा इस धारा के अनुकूल और धारा के प्रतिकूल दूरी को तय करने में लिया गया समय क्रमशः 4 घंटे और 7.5 घंटे है। यदि धारा की गति 5 किमी/घंटा है, तो स्थिर जल में नाव की गति ज्ञात कीजिए।A. 30 km/hrB. 25 km/hrC. 20 km/hrD. 18 km/hrE. None of theseOption “B” is correct.Let the speed of the boat in still water be B km/hr.((B + 5) * 4)/((B – 5) * 7.5) = 4/5(B + 5)/((B – 5) * 1.5) = 1/1B + 5 = 1.5B – 7.50.5B = 12.5B = 25 km/hr 156. A boat can cover 152 km downstream and 102 km upstream in 9 hours. If the ratio of the speed of the boat in still water to the speed of the stream is 7:1, then find the speed of the boat in still water.एक नाव धारा के अनुकूल 152 किमी और धारा के प्रतिकूल 102 किमी 9 घंटे में तय कर सकती है। यदि स्थिर जल में नाव की गति से धारा की गति का अनुपात 7:1 है, तो स्थिर जल में नाव की गति ज्ञात कीजिए।A. 28 km/hB. 35 km/hC. 14 km/hD. 21 km/hE. None of theseOption “A” is correct.Let the speed of the boat in still water and speed of the stream be 7x km/h and x km/h respectively.Speed of boat in upstream = 7x-x = 6x km/hSpeed of boat in downstream = 7x + x = 8x km/h(102/6x) + (152/8x) = 9= {(17+19)/x} = 936/x = 9x = 4So, speed of the boat in still water = 7 x 4 = 28 km/h 157. The time taken by the boat to cover 140 km downstream is 1/2 of the time taken by the boat to cover 120 km upstream. If the speed of the stream is 8 km/hr, then find the speed of the boat in still water.नाव द्वारा धारा के अनुकूल 140 किमी की दूरी तय करने में लिया गया समय, नाव द्वारा 120 किमी धारा के प्रतिकूल तय करने में लगने वाले समय का 1/2 है। यदि धारा की गति 8 किमी/घंटा है, तो स्थिर जल में नाव की गति ज्ञात कीजिए।A. 16 km/hrB. 24 km/hrC. 32 km/hrD. 20 km/hrE. None of theseOption “D” is correct.Let the speed of the boat in still water = x140/(x + 8)/(120/(x – 8)) = 1/2140/(x + 8) = 120/(x – 8) * 1/2140 * (x – 8) = 60 * (x + 8)140x – 1120 = 60x + 48080x = 1600x = 20The speed of the boat in still water = 20 km/hr 158. A boat covers a certain distance in downstream in 10 hours and a certain distance in upstream in 20 hours and the total distance travelled in downstream and upstream is 620 km. If the speed of the stream is 4 km/hr, then find the downstream speed of the boat.एक नाव धारा के अनुकूल एक निश्चित दूरी 10 घंटे में और धारा के प्रतिकूल एक निश्चित दूरी 20 घंटे में तय करती है और धारा के अनुकूल और धारा के प्रतिकूल तय की गई कुल दूरी 620 किमी है। यदि धारा की गति 4 किमी/घंटा है, तो नाव की धारा के अनुकूल गति ज्ञात कीजिए।A. 18 km/hrB. 28 km/hrC. 15 km/hrD. 26 km/hrE. None of theseOption “D” is correct.Speed of the boat in still water = xSpeed of the current = 4 km/hr(x + 4) * 10 + (x – 4) * 20 = 62030x = 660x = 22 km/hrDownstream speed of the boat = 22 + 4 = 26 km/hr 159. The boat will take 2 hours to cover the distance of 20km in downstream and while covering the same distance in upstream it will take 5 hours. Find the speed of the current.नाव को धारा के अनुकूल 20 किमी दूरी तय करने में 2 घंटे का समय लगेगा और धारा के प्रतिकूल उसी दूरी को तय करने में 5 घंटे का समय लगेगा। धारा की गति ज्ञात कीजिए।A. 2kmphB. 3kmphC. 4kmphD. 5kmphE. None of theseOption “B” is correct.Downstream speed=20/2=10kmphUpstream speed=20/5=4kmphSpeed of the current=1/2*(10-4)=3kmph 160. The speed of the current is 4 km/hr. A boat goes 10 km upstream and comes back to starting point in 80 minutes. What is the speed of the boat in still water? (In km/hr)धारा की गति 4 किमी/घंटा है। एक नाव धारा के प्रतिकूल 10 किमी जाती है और 80 मिनट में प्रारंभिक बिंदु पर वापस आती है। शांत जल में नाव की गति क्या है? (किमी/घंटा में)A. 10 km/hrB. 16 km/hrC. 14 km/hrD. 12 km/hrE. 8 km/hrOption “B” is correct.Let the speed of boat be x km/hrAccording to the question, 10/(x – 4) + 10/(x + 4) = 80/60=> 10 (x + 4 + x – 4) = 4/3(x2 – 16)=> 15x = x2 – 16=>x2 – 16 – 15x = 0=> x = 16, -1     (taking only positive value)Therefore, the speed of boat in still water = 16km/hr