Multiple Choice Questions

A man can row three quarters of a kilometer against the stream in 45 4 minutes and return in 15 2 mi...........

Elelmentary Mathematics (UPPCS) Boats and Streams

A man can row three-quarters of a kilometer against the stream in 45/4 minutes and return in 15/2 minutes. The speed of the stream

1km/hr

3km/hr

5km/hr

4km/hr

Solution:
Upstream in 45/4min=3/4km
In 1 hr =3/4*4/45*60
=4km/hr.
Downstream in 15/2min=3/4km
In 1 hr=3/4*2/15*60
=6km/hr.
V=(6-4)/2
=2/2
=1km/hr.

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