Sun	Mon	Tue	Wed	Thu	Fri	Sat
23	24	25	26	27	28	1
2	3	4	5	6	7	8
9	10	11	12	13	14	15
16	17	18	19	20	21	22
23	24	25	26	27	28	29
30	31	1	2	3	4	5

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Multiple Choice Questions

A man rows to a place 60 km distance and back in 13 hours 30 minutes He finds that he can row 5 km w...........

Numerical Ability Boats and Streams

A man rows to a place 60 km distance and back in 13 hours 30 minutes. He finds that he can row 5 km with the stream in the same time as he can row 4 km against the stream. Find the rate of the stream.

8km/hr

1/2 km/hr

10 km/hr

1 km/hr

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Explanation:

60/ (x + y) + 60/(x - y) = 27/2 ………. (i)
5/ (x + y) = 4/(x - y)
5x – 5y = 4x + 4y
x = 9y …………. (ii)
Put this in equation (i)
60/10y + 60/8y = 27/2
27y/2 = 27/2
y = 1 km/hr

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