Boats and Stream
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51 A boat can travel with a speed of 11 km/hr in still water. If the speed of the stream is 3 km/hr, find the time taken by the boat to go 70 km downstream:
52 A man rows downstream 32 km and 14 km upstream. If he takes 9 hours to cover each distance, then the velocity (in kmph) of the current is:
53 If a boat goes 7 km upstream in 42 minutes and the speed of the stream is 3 kmph, then the speed of the boat in still water is:
54 In one hour, a boat goes 11 km along the stream and 5 km against the stream. What is the speed of the boat in still water (in km/hr)?
55 If a man rows at the rate of 5 kmph in still water and his rate against the current is 3.5 km/hr, then the man’s rate along the current is:
56 A man can row at 6 km/hr in still water. If the velocity of current is 1 km/hr and it takes him 1 hour to row to a place and come back, how far is the place?
57 A man can row 9(1/3) kmph in still water and finds that it takes him thrice as much time to row up than as to row down the same distance in the river. The speed of the current is:
58 A boat covers 24 km upstream and 36 km downstream in 6 hours while it covers 36 km upstream and 24 km downstream in 6($$\frac{1}{2}$$) hours. The velocity of the current is:
