Question

A river is flowing from west
to east at a speed of 8 m per
minute. A man on the south
bank of the river, capable of
swimming at 20 m per
minute in still water, wants to
swim across the river in the
shortest time. He should
swim in a direction
a) due north. b)30°east of north. c) 30°east of north d)60° east of north​

Answer 1

Answer:

a) due north

Explanation:

as he should reach in shortest time, so he has to swim perpendicularly. so option a is correct.