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A. 2km/hr
B. 3km/hr
C. 4 km/hr
D. 5 km/hr

Explanation:

Distance covered upstream in 45/4min =3/4 km

Distance covered upstream in 1 hr =(3/4 × 2/15 × 60) km/hr = 4 km/hr

Distance covered downstream in 15/2 min = ¾ km

Distance covered downstream in 1hr

= (3/4 × 2/15 × 60)km/hr = 6 km/hr

Speed of the man in still water

= ½ (6 + 4)km/hr = 5 km/hr

Correct Answer: 5 km/hr

Last Updated: September 22, 2019