If the ratio of the radii of two sphere is 3 : 7.

Find : the ratio of their surface areas.

Question

If the ratio of the radii of two sphere is 3 7 Find the ratio of their surface areas

Accepted Answer

Solution The curved surface area of a sphere equals the spheres entire area because the sphere is completely curved Surface area of a sphere 4 rsup2sup Ratio of surface areas of two spheres 4 rsub1subsup2sup4 rsub2subsup2sup rsub1subsup2suprsub2subsup2sup 3sup2sup7sup2sup 949 Hence the ratio of the surface areas is 949

ML Aggarwal Solutions Class 10 Mathematics Solutions for Mensuration Exercise 17.3 in Chapter 17 - Mensuration