Boats and Streams Practice Question and Answer
8 Q: If a sailer sails 12 km distance within 5 hours against the flow of a river. If he sails 22 km distance in same time along the flow of the river. Then velocity of the river is _______
2050 05e788081948fba6459010c46
5e788081948fba6459010c46- 11 km / hourtrue
- 22 km / hourfalse
- 31.5 km / hourfalse
- 42.5 km / hourfalse
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Answer : 1. "1 km / hour "
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.
977 064a541a5c4e3d04ca162e184
64a541a5c4e3d04ca162e184- 111.25true
- 228.75false
- 318.25false
- 410.55false
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Answer : 1. "11.25 "
Q: A boat covers 48 km. upstream and 72 km. downstream in 12 hours, while it covers 72 km. upstream and 48 km. downstream is 13 hours. The speed of stream is -
890 060f7d5753ca0726dff34f9e6
60f7d5753ca0726dff34f9e6- 12.5 kmphfalse
- 24 kmphfalse
- 32 kmphtrue
- 42.2 kmphfalse
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Answer : 3. "2 kmph"
Q: A boat goes from A to B in upstream and come back from B to A downstream taking a total time of 3.5 hours. If the speed of boat in still water is 7 km/hr and the speed of stream is 5 km/hr. Find the distance between A and B.
870 0605a95cf281aeb2a4f44a1cf
605a95cf281aeb2a4f44a1cf- 14 kmfalse
- 26 kmtrue
- 35 kmfalse
- 47.5 kmfalse
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Answer : 2. "6 km"
Q: A boat goes 15 km in an hour in still water, and takes thrice the time to cover the same distance upstream. The speed of the current (in km / hr) is –
828 062fb40bdd30c675eef59e1bf
62fb40bdd30c675eef59e1bf- 113 km/hrfalse
- 214 km/hrtrue
- 313 km/hrfalse
- 414 km/hrfalse
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Answer : 2. "14 km/hr"
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?
823 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 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)?
769 064953b8acae316dfef75c0ad
64953b8acae316dfef75c0ad- 15.50false
- 28.98false
- 37.98true
- 46.25false
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Answer : 3. "7.98 "
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]
670 0642d33149d18d2e8ae2a7310
642d33149d18d2e8ae2a7310- 113 ; 5false
- 211 ; 4false
- 313 ; 2true
- 413 ; 6false
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