problems on boats and streams set2
AnswersProblems on Boats and Streams(Set 2) - Solved Examples
| 31. If a man's rate with the current is 15 km/hr and the rate of the current is 11⁄2 km/hr, then his rate against the current is | |
| A. 12 km/hr | B. 10 km/hr |
| C. 10.5 km/hr | D. 12.5 km/hr |
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| 32. The speed of the boat in still water in 12 kmph. It can travel downstream through 45 kms in 3 hrs. In what time would it cover the same distance upstream? | |
| A. 8 hours | B. 6 hours |
| C. 4 hours | D. 5 hours |
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| 33. A boat goes 8 km upstream in 24 minutes. The speed of stream is 4 km/hr. The speed of boat in still water is: | |
| A. 25 km/hr | B. 26 km/hr |
| C. 22 km/hr | D. 24 km/hr |
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| | Discuss |
| 34. The speed of a boat in still water is 25 kmph. If it can travel 10 km upstream in 1 hr, what time it would take to travel the same distance downstream? | |
| A. 22 minutes | B. 30 minutes |
| C. 40 minutes | D. 15 minutes |
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| | Discuss |
| 35. A boat can travel with a speed of 12 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream. | |
| A. 4 hr | B. 4.25 hr |
| C. 4.5 hr | D. 6 hr |
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| | Discuss |
| 36. A man can row 7.5 kmph in still water and he finds that it takes him twice as long to row up as to row down the river. Find the rate of stream. | |
| A. 10 km/hr | B. 2.5 km/hr |
| C. 5 km/hr | D. 7.5 km/hr |
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| | Discuss |
| 37. A boat moves downstream at the rate of one km in 5 minutes and upstream at the rate of 4 km an hour. What is the velocity of the current? | |
| A. 4 km/hr | B. 2 km/hr |
| C. 3 km/hr | D. 1 km/hr |
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| | Discuss |
| 38. The speed of a boat in still water is 15 km/hr and the rate of current is 3 km/hr. The distance travelled downstream in 24 minutes is | |
| A. 3.6 km | B. 2.4 km |
| C. 3.2 km | D. 7.2 km |
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| | Discuss |
| 39. The current of a stream runs at the rate of 2 km per hr. A motor boat goes 10 km upstream and back again to the starting point in 55 min. Find the speed of the motor boat in still water? | |
| A. 22 km/hr | B. 12 km/hr |
| C. 20 km/hr | D. 16 km/hr |
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| | Discuss |
| 40. The speed of a boat in still water is 8 kmph. If it can travel 1 km upstream in 1 hr, what time it would take to travel the same distance downstream? | |
| A. 1 minute | B. 2 minutes |
| C. 3 minutes | D. 4 minutes |
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| | Discuss |
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