A man can row three-quarters of a kilometre against the stream in 11¼ minutes and down the stream in 7½ minutes. The speed (in km/hr) of the man in still water is:

Question

Accepted Answer

We can write three-quarters of a kilometre as 750 metres, and 11¼ minutes as 675 seconds. Rate upstream = ❨ 750 ❩m/sec

=	❨	25	x	18	❩km/hr
		18		5

=	25	m/sec
	18

A man can row three-quarters of a kilometre against the stream in 11¼ minutes and down the stream in 7½ minutes. The speed (in km/hr) of the man in still water is:

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