Boats and Streams Practice Question and Answer
8 Q: A Man rows to a place 63 km far and comes back in 16 hours. He finds that he can row 18 km with the flow in the same time taken to row 14 km against the flow. What is the speed of the stream?
571 064f1eeeaa1e68c7201a2488a
64f1eeeaa1e68c7201a2488a- 11 km/hrtrue
- 22 km/hrfalse
- 32.5 km/hrfalse
- 44 km/hrfalse
- 55 km/hrfalse
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Answer : 1. "1 km/hr"
Q: A boat starts travelling from point P, travels to point Q then returns to point P. The boat takes 12 hours to complete the journey. The speed of the stream is 5 km/hour and the speed of the boat in still water is 10 km/hour. What is the distance between P and Q?
514 064e760cc2e7e7af712bc88cc
64e760cc2e7e7af712bc88cc- 145true
- 225false
- 335false
- 455false
- 560false
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Answer : 1. "45"
Q: A boat covers 35 km downstream in 2 h and covers the same distance upstream in 7 h. Find the speed (in km/h) of the boat in still water.
956 064a541a5c4e3d04ca162e184
64a541a5c4e3d04ca162e184- 111.25true
- 228.75false
- 318.25false
- 410.55false
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Answer : 1. "11.25 "
Q: A man can row 10 km/h in still water. When the river is running at a speed of 4.5 km/h, then it takes him 2 h to row to a place and comes back to the initial point . How far is the place (in km) (rounded off to two decimal places)?
749 064953b8acae316dfef75c0ad
64953b8acae316dfef75c0ad- 15.50false
- 28.98false
- 37.98true
- 46.25false
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Answer : 3. "7.98 "
Q: A boat moves 25km upstream and 39km downstream in 8 hours. It travels 35km upstream and 52km downstream in 11 hours. What is the speed of the stream if it travels at a uniform speed?
564 0647f302fa33e0f47b76f02dd
647f302fa33e0f47b76f02dd- 15 km/hfalse
- 24 km/htrue
- 36 km/hfalse
- 43 km/hfalse
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Answer : 2. "4 km/h "
Q: A man rows from J to K (upstream) and back from K to J (downstream) in a total time of 15 hours. The distance between J and K is 300 km. The time taken by the man to row 9 km downstream is identical to the time taken by him to row 3 km upstream. What is the approximate speed of the boat in still water?
787 0643d1b1332185cce373ef571
643d1b1332185cce373ef571- 151.33 km/hfalse
- 247.67 km/hfalse
- 353.33 km/htrue
- 443.67 km/hfalse
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Answer : 3. "53.33 km/h"
Q: A man can row downstream at a speed of 15 km/h and upstream at 11 km/h. Find his speed in still water and the speed of the current, respectively. [Give both your answers in km/h]
653 0642d33149d18d2e8ae2a7310
642d33149d18d2e8ae2a7310- 113 ; 5false
- 211 ; 4false
- 313 ; 2true
- 413 ; 6false
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Answer : 3. "13 ; 2 "
Q: The speed of a boat in still water is 10 km/h. The speed of the stream is 2 km/h. What is the total distance that the boat will travel if it is rowed for 4 hours upstream and 3 hours downstream?
488 0642d30092b960e1a4198fab2
642d30092b960e1a4198fab2- 170 kmfalse
- 272 kmfalse
- 364 kmfalse
- 468 kmtrue
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