Latest CSC Aptitude Question SOLUTION: A boat travels 72 km downstream in 8 hours and 84 km upstream in 12 hours. Find the speed of the boat in still water and the speed of the water current. a) 8 km/hr, 1 km/hr b)5 k

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A boat travels 72 km downstream in 8 hours and 84 km upstream in 12 hours. Find the speed of the boat in still water and the speed of the water current.

a) 8 km/hr, 1 km/hr b)5 km/hr, 4 km/hr c) 1 km/hr, 6 km/hr d)2 km/hr, 1 km/hr

Asked In CSC (12 years ago)

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padmadevi.m  (11 years ago)

Downstream speed=72km/8hrs
=9kmph
upstream speed=84km/12hrs
=7kmph
speed of boat=avg of downstream and upstream speeds
speed of boat=(9+7)/2kmph
=8kmph.
current speed=half of the difference of downstream and upstream speeds
currend speed=(9-7)/2kmph
=1kmph
ans is 8km/hr,1km/hr

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