The surface are of a balloon being inflated changes at a constant rate. If initially, its radius is3 units sand after 2 seconds, it s 5 units, find the radius after t seconds.

The surface are of a balloon being inflated changes at a constant rate.If initially,its radius is 3units sand after 2 seconds,it s5 units,find the radius after t seconds.

The volume of spherical balloon being inflated changes at a constant rate.If initially its radius is 3 units and after 3 seconds it is 6 units.Find the radius of balloon after t seconds.

The surface area of a balloon being inflated, changes at a rate proportional to time t . If initially its radius is 1 unit and after 3 secons it is 2 units, find the radius after t seconds.

The volume of a spherical balloon being inflated changes at a constant rate.If initially its radius is 3 units and after 3 seconds it is 6 units.Find the radius of the balloon after 1 seconds.

The surface area of a balloon, being inflated, changes at a rate proportional to time t. (i) If initially its radius is 1 unit and after 3 seconds it is 2 units, find the radius after time t. (ii) If initially its radius is 3 units and after 2 seconds it is 5 units, find the radius after t seconds.

Find the surface area of a sphere when its volume is changing at the same rate as its radius.

Area A of a blot of increasing in such a way that, after t second , A=3t+t^(3) . Rate at which the blot is expanding after 2 seconds is

A spherical balloon whose initial radius was 3m is expanded such that it's surface area is increasing at a constant rate of 72 pi m^(2)/sec .What is the speed of a point (in m/s) on the surface in the radially outward direction when radius becomes 9m ?

At time t>0, the volume of a sphere is increasing at a rate proportional to the reciprocal of its radius.At t=0 ,the radius of the sphere is 1 unit and at t=15 the radius of 2 units.

A Spherical balloon is being inflated at the rate of 35cc/min. The rate of increase in the surface area(in cm2/min. of the balloon when its diameter is 14cm, is