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A motorboat covers the distance between ...

A motorboat covers the distance between two spots on the river banks `t_(1)=8h` and `t_(2)=12h` in down stream and upstream respectively. The time required for the boat to cover this distance in still water will be

A

6.9 hr

B

9.6 hr

C

69 sec

D

96 sec

Text Solution

Verified by Experts

Let s be the distance between that two spots. Also assume that the velocity of the motor boat in still water is v and the velocity of flow of water is u. Then , for downward journey,
` s//t_(1) = v + u ` ……(A)
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