Trains Boats and Streams Practice Test 4 with solutions

Question : 37 of 40

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A man can swim 3 km/hr in still water. If the velocity of the stream be 2 km/hr, find the time taken by him to swim to a point 10 km upstream and back.

12 hours
10 hours
8 hours
6 hours

Validate

Solution:

Downstream speed = (3 + 2) = 5 km/hr
Upstream speed = (3 – 2) = 1 km/hr
Required time =

{10}/1+{10}/5

= 12 hrs.

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