Physics-
General
Easy
Question
A motion boat covers a given distance in 6 h moving down stream of a river. It covers the same distance in 10 h moving upstream. The time (in hour) it takes to cover the same distance in still water is
- 6
- 7.5
- 10
- 15
The correct answer is: 7.5
Let 
be velocity of water and 
be the velocity of motor boat in still water. If 
is the distance covered, then as per question
On solving, 
Time taken by motor boat to cross the same distance in still water is
h
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