Put the values in the formula and do the calculations correctly .

Try to find the radius of the sphere and then find the volume of sphere .

First of all find the radius of the sphere.

Think about the formula to calculate the volume of a sphere and hemisphere.

Find the Total surface area of the hemisphere as they have given us the cost of painting it .

Find the internal volume of the spherical tank and subtract this volume from the external volume of the spherical tank.

First of all find the surface area of the given hemisphere by relating the cost to the rate .

Put the values in the formula and do the calculations correctly .

Find the volume of individual spherical and cylindrical structures and add them together to know the volume .

Put the values in the formula and do the calculations correctly .