An object moving with a speed of 6.25 m/s, is decelerated at a rate given by : <br>$\frac{dv}{dt} = -2.5 \sqrt{v}$ <br> where $v$ is the instantaneous speed. The time taken by the object, to come to rest, would be :

Question

( A ) 2 s
( B ) 4 s
( C ) 1 s
( D ) 8 s