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An object , moving with a speed of 6.25...

An object , moving with a speed of ` 6.25 m//s `, is decelerated at a rate given by :
`(dv)/(dt) = - 2.5 sqrt (v)` where `v` is the instantaneous speed . The time taken by the object , to come to rest , would be :

A

2s

B

4s

C

8s

D

1s

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The correct Answer is:
A
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