Question

A river is flowing downstream at rate of 2 km/h. Murray can swim at a rate of 3 km/h. Murray jumps in and swims downstream for a certain distance then turns around and swims upstream back to the start. In total it takes 30 minutes. How far did Murray swim downstream?

Answer 1

Murray can swim 3/4 km downstream

Explanation:

Since the current adds to his speed and

then subtracts the same amount, you can

disregard the current

d=r*t

Convert 15 min to hrs ( time to swim downstream )

15(1/60)=1/4 hours

d=3(1/4)

d=3/4 km downstream.

Hence Murray can swim 3/4 km downstream....