Compare the initial and new volume to find the ratio.

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

Find the surface area of the given cage.

Find the volume of the water inside the cylidrical vessel and then find the volume of spherical ball .

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 .

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

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 .

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