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A motorboat covers a given distance in 6...

A motorboat covers a given distance in 6 hours moving downstream on a river. It covers the same distance in 10 hours moving upstream. The time it takes to cover the same distance in still water is

A

6.5 hours

B

8 hours

C

9 hours

D

7.5 hours

Text Solution

Verified by Experts

The correct Answer is:
d
In still water time taken is given by
`t=(2t_1t_2)/(t_1+t_2)`
`t=(2xx6xx10)/(6+10)=(120)/(16)=7.5 hrs`
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