A balloon, which always remains spherical has a variable radius. Find the rate at
which volume is increasing with the radius when the later is 10 cm.

A balloon which always remains spherical has a variable radius. Find the rate at which its volume is increasing with the radius when the latter is 10cm .

A balloon which always remains spherical has a variable diameter 3/2(2 x+1) . Find the rate of change of its volume with respect to x

A balloon, which always remains spherical, has a variable diameter 3/2(2x+1) . Find the rate of change of its volume w.r.t. x.

Suppose that a spherical balloon is inflated and it has volume 'v' and radius 'r' at time 't'. If the balloon is inflated by pumping 900c.c. of gas per second. Find the rate at which the radius of the balloon is increasing when the radious is 15 cm.

The radius of a circle is increasing uniformly at the rate of 3cm/s. Find the rate at which the area of the circle is increasing when the radius is 10 cm.

The radius of a circle is increasing uniformly at the rate of 3 cm / s . Find the rate at which the area of the circle is increasing when the radius is 10cm .

The radius of a circle is increasing at the rate of 2cm//s . Find the rate at which area of the circle is increasing when radius is 6 cm.

A circular disc of radius 3 cm is being heated. Due to expansion, its radius increases at the rate of 0.05 cm / s. Find the rate at which its area is increasing when radius is 3.2 cm.

Find the rate of change of the area of a circle with respect to its radius r when r = 3 cm.