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A boat going down stream crosses a float...

A boat going down stream crosses a float at a point A. `'t_1'` minutes later the boat reverses its direction and in the next `'t_2'` minutes it crosses the float at a distance L from the point A. The velocity of the river is 

A

`2L//t_1`

B

`L//(t_1 + 2t_2)`

C

`2L//(2t_1 + t_2)`

D

`L//2t_1`

Text Solution

Verified by Experts

The correct Answer is:
D
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