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?
574 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 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 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?
517 064e760cc2e7e7af712bc88cc
64e760cc2e7e7af712bc88cc- 145true
- 225false
- 335false
- 455false
- 560false
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Answer : 1. "45"
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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Answer : 4. "68 km"
Q: On a river, Q is the mid-point between two points P and R on the same bank of the river. A boat can go from P to Q and back in 12 hours, and from P to R in 16 hours 40 min. How long would it take to go from R to P?
439 064083abda37bb1a5e169cbdc
64083abda37bb1a5e169cbdc- 1$$3{3\over7}hr$$false
- 2$$7{4\over3}hr$$false
- 3$$6{2\over3}hr$$false
- 4$$7{1\over3}hr$$true
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Answer : 4. "$$7{1\over3}hr$$"
Q: Speed of a along and against the current are 14 km / hr and 8 kms/hr respectively. The speed of the current is:
433 0640838b1a37bb1a5e169be56
640838b1a37bb1a5e169be56- 111km/hrfalse
- 26 km/hrfalse
- 31.33 km/hrfalse
- 43 km/hrtrue
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Answer : 4. "3 km/hr"
Q: A man can row upstream at 12 km/hr and dowstream at 18 km/hr. The man's rowing speed in still water is:
421 064083a423218fd8d147b6785
64083a423218fd8d147b6785- 115 km / hrtrue
- 25 km /hrfalse
- 33 km /hrfalse
- 410 km /hrfalse
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Answer : 1. "15 km / hr"
Q: The water in a river is flowing at the rate of 4 km/hr. If the width and depth of the river is 8m and 4m respectively, then how much water will enter the sea in 15 minutes.
401 0640836aa36c856ead7981490
640836aa36c856ead7981490- 1$$60000 m^3 $$false
- 2$$18000 m^3 $$false
- 3$$288000 m^3 $$false
- 4$$32000 m^3 $$true
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