1.

A spherical ball of salt is dissolving in water in such a manner that the rate of decrease of the volume at any instant is propotional to the surface. Prove that the radius is decreasing at a constant rate. Hint for solution : Take volume V and curve surface are S of spherical ball. Calculate by taking (dV)/(dt)alpha S.

Answer»


ANSWER :`(DR)/(DT)=K`


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