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A particle is moving in a circle of radi...

A particle is moving in a circle of radius R in such a way that at any instant the total acceleration makes an angle of `45^@` with radius. Initial speed of particle is `V_0`. The time taken to complete the first revolution is

A

`R/V_0 e^(-2pi)`

B

`R/V_0 (1-e^(-2pi))`

C

`R/V_0`

D

(2R)/V_0`

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The correct Answer is:
B
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