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 can row 30 km down stream and return in a total of 8 hours If speed of the boat in still water...........

Quantitative Aptitude (CHSL) Boats and Streams

A man can row 30 km down-stream and return in a total of 8 hours. If speed of the boat in still water iš four times the speed of the current, then the speed of the current is

1 km/hr

2 km/hr

4 km/hr

3 km/hr

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Explanation:

Let the speed of stream current = y km/h
and the speed of boat in still water=x km/h = 4y
30/(x + y) + 30 (x – y) = 8
30/5y + 30/3y = 8
6/y + 10/y = 8
y = 2 km/h

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