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

91. Boat A covers 90 km upstream in 5 hours and boat B covers 180 km downstream in 5 hours. The ratio of the speed of boat A to boat B in still water is 4:5. If both boats are rowing in the same river, then find the downstream speed of boat A?

नाव A 5 घंटे में धारा के प्रतिकूल 90 किमी की दूरी तय करती है और नाव B धारा के अनुकूल 5 घंटे में 180 किमी की दूरी तय करती है। स्थिर जल में नाव A से नाव B की गति का अनुपात 4:5 है। यदि दोनों नावें एक ही नदी में चल रही हैं, तो नाव A की धारा के अनुकूल गति ज्ञात कीजिये?

A. 30 km/hr
B. 40 km/hr
C. 24 km/hr
D. 36 km/hr
E. None of these

Option “A” is correct.

Let the speed of boat A in still water = 4x

And the speed of boat B in still water = 5x

The upstream speed of boat A = 90/5 = 18 km/hr

The downstream speed of boat B = 180/5 = 36 km/hr

Speed of stream= y

4x – y = 18 —(1)

5x + y = 36 —(2)

From (1) and (2),

9x = 54

x = 6

4 * 6 – y = 18

y = 24 – 18

y = 6

The speed of boat A in still water = 4 * 6 = 24 km/hr

The speed of the stream = 6 km/hr

The downstream speed of boat A = 24 + 6 = 30 km/hr

92. A swimmer takes 60 minutes to go 15 km downstream and takes 45 minutes hours to go 3.75 km upstream in the same river. What is the speed of stream?

एक तैराक को धारा के अनुकूल 15 किमी जाने में 60 मिनट लगते हैं और समान नदी में धारा के प्रतिकूल 3.75 किमी जाने में 45 मिनट घंटे लगते हैं। धारा की गति क्या है?

A. 8 kmph
B. 10 kmph
C. 2 kmph
D. 4 kmph
E. 5 kmph

Option “E” is correct.

Speed of downstream = 15/1 = 15 kmph

Speed of upstream = 3.75/(45/60) = 5 kmph

Speed of stream = (15 – 5)/2 = 5 kmph

93. A boat row at 40 kmph in still water. If the speed of the stream is half of the speed of the boat in still water and the boat row from Madurai to Virudhunagar and back to Madurai in 12 hours and the distance between Madurai and Virudhunagar is D km. Find the time taken by boat B covers D km along with stream, if the boat B rows in the same river and the speed of boat B in still water is 30 kmph?

नाव स्थिर जल में 40 किमी प्रति घंटे की गति से चलती है। यदि धारा की गति स्थिर जल में नाव की गति की आधी है और नाव मदुरै से विरुधुनगर तक जाती है और 12 घंटे में मदुरै वापस आती है और मदुरै और विरुधुनगर के बीच की दूरी D किमी है। नाव B द्वारा D किमी को धारा के अनुकूल तय करने में लगने वाला समय ज्ञात करें, यदि नाव B समान नदी में चलती है और स्थिर जल में नाव B की गति 30 किमी प्रति घंटा है?

A. 4.2 hours
B. 4 hours
C. 3.6 hours
D. 3.2 hours
E. None of these

Option “C” is correct.

Speed of stream = 40/2 = 20 kmph

D/(40 + 20) + D/(40 – 20) = 12

60D + 20D = 14400

D = 180 km

Required time = 180/(30 + 20) = 3.6 hours

94. Ratio of the speed of the boat in still water to stream is 5:1, and the time taken by the boat to cover 192 km downstream and the same boat to cover y km upstream together in 15 hours. If the speed of the stream is 4 km/hr, then find the value of y.

स्थिर जल में नाव से धारा की गति का अनुपात 5:1 है, और नाव द्वारा धारा के अनुकूल 192 किमी की दूरी तय करने में और समान नाव को धारा के प्रतिकूल y किमी की दूरी तय करने में लगने वाला समय 15 घंटे है। यदि धारा की गति 4 किमी/घंटा है, तो y का मान ज्ञात कीजिए।

A. 144 km
B. 96 km
C. 108 km
D. 112 km
E. None of these

Option “D” is correct.

The speed of the boat in still water = 4 * 5/1 = 20 km/hr

192/(20 + 4) + y/(20 – 4) = 15

192/24 + y/16 = 15

y/16 = 15 – 8

y = 16 * 7 = 112

95. The boat covers 180 km downstream in 4 hours at stream x and the same boat covers 300 km downstream in 6 hours at stream y. If the upstream speed of the boat at stream x is 35 km/hr, then find the difference between the speeds of streams x and y.

नाव धारा x पर 4 घंटे में धारा के अनुकूल 180 किमी की दूरी तय करती है और समान नाव धारा y पर 6 घंटे में धारा के अनुकूल 300 किमी की दूरी तय करती है। यदि धारा x पर नाव की धारा के प्रतिकूल गति 35 किमी/घंटा है, तो धारा x और y की गति के बीच का अंतर ज्ञात कीजिए।

A. 5 km/hr
B. 4 km/hr
C. 6 km/hr
D. 3 km/hr
E. None of these

Option “A” is correct.

The downstream speed of the boat at stream x = 180/4 = 45 km/hr

The speed of stream x = (45 – 35)/2 = 10/2 = 5 km/hr

The downstream speed of the boat at stream y = 300/6 = 50 km/hr

The speed of stream y = 50 – (45 – 5) = 50 – 40 = 10 km/hr

Required difference = 10 – 5 = 5 km/hr

96. A boat covers 360 km downstream in 9 hours. If the speed of the stream is increased by 12.5%, then the boat covers 205 km downstream in 5 hours. Find the speed of the boat in still water.

एक नाव 9 घंटे में धारा के अनुकूल 360 किमी की दूरी तय करती है। यदि धारा की गति में 12.5% की वृद्धि की जाती है, तो नाव 5 घंटे में धारा के अनुकूल 205 किमी की दूरी तय करती है। स्थिर जल में नाव की गति ज्ञात कीजिए।

A. 30 km/hr
B. 25 km/hr
C. 32 km/hr
D. 28 km/hr
E. None of these

Option “C” is correct.

The initial downstream speed of the boat = 360/9 = 40 km/hr

The new downstream speed of the boat = 205/5 = 41 km/hr

x + y = 40—(1)

x + y * 112.5/100 = 41

x + 9y/8 = 41 —(2)

Equations (1) and (2),

– x – y = – 40

x + 9y/8 = 41

9y/8 – y = 1

y = 8

x = 40 – 8 = 32

The speed of the boat in still water = 32 km/hr

97. A boat covers D km downstream in 7 hours at river P and the same boat covers(D-52) km upstream in 8 hours at river R and the ratio of the speed of the river P to R is 6:5. If the speed of the boat in still water is 30 km/hr, then find the speed of the river R.

एक नाव नदी P में धारा के अनुकूल D किमी 7 घंटे में तय करती है और वही नाव नदी R में 8 घंटे में धारा के विपरीत (D-52) किमी तय करती है और नदी P से R की गति का अनुपात 6:5 है। यदि स्थिर जल में नाव की गति 30 किमी/घंटा है, तो नदी R की गति ज्ञात कीजिए।

A. 2.5 km/hr
B. 10 km/hr
C. 7.5 km/hr
D. 5.5 km/hr
E. None of these

Option “E” is correct.

(30 + 6x) * 7 = (30 – 5x) * 8 + 52

210 + 42x = 240 – 40x + 52

82x = 30 + 52

x = 1

The speed of the river R = 5 * 1 = 5 km/hr

98. Boat A takes 10 hours to travel from point P to Q in the downstream direction. One-third of the distance between points P to Q is 90 km. Ratio of the speed of boat A to B in still water is 8:7. If the speed of the stream is 3 km/hr, then find the time taken by boat B to cover from point P to Q in the upstream direction.

नाव A को धारा के अनुकूल दिशा में बिंदु P से Q तक यात्रा करने में 10 घंटे लगते हैं। बिंदु P से Q के बीच की दूरी का एक तिहाई 90 किमी है। स्थिर जल में नाव A से B की गति का अनुपात 8:7 है। यदि धारा की गति 3 किमी/घंटा है, तो नाव B द्वारा धारा के विपरीत दिशा में बिंदु P से Q तक जाने में लिया गया समय ज्ञात कीजिए।

A. 12 hours
B. 15 hours
C. 9 hours
D. 18 hours
E. None of these

Option “B” is correct.

The distance between points P to Q = 90 * 3/1 = 270 km

The downstream speed of boat A = 270/10 = 27 km/hr

The speed of boat A in still water = 27 – 3 = 24 km/hr

The speed of boat B in still water = 24 * 7/8 = 21 km/hr

Required time = 270/(21 – 3) = 270/18 = 15 hours

99. A boat travels 120 km downstream in 6 hours and the speed of the stream is 5 kmph. What is the speed of the upstream?

एक नाव 6 घंटे में 120 किमी अनुप्रवाह की दूरी तय करती है और धारा की गति 5 किमी प्रति घंटा है। ऊर्ध्वप्रवाह की गति क्या है?

A. 10 kmph
B. 15 kmph
C. 12 kmph
D. 8 kmph
E. None of these

Option “A” is correct.

Downstream speed = 120/6 = 20 kmph

Speed of the stream = 5 kmph

Speed of the boat in still water = 20 – 5 = 15 kmph

Upstream speed = 15 – 5 = 10 kmph

100. The speed of the boat travelling downstream is 35 kmph and the speed of the boat travelling against current is 15 kmph. What is the speed of the stream?

अनुप्राह यात्रा करने वाले नाव की गति 35 किमी प्रति घंटा है और (ऊर्ध्वप्रवाह)धारा के विरुद्ध यात्रा करने वाले नाव की गति 15 किमी प्रति घंटा है। धारा की गति क्या है?

A. 5 kmph
B. 8 kmph
C. 10 kmph
D. 15 kmph
E. None of these

Option “C” is correct.

Speed of the stream = ½ (downstream speed – upstream speed)

= ½ (35 – 15)

= 10 kmph