The radius of a sphere is 14 cm. It is melted to form smaller spheres each having a radius of 7 cm. What will be the ratio of surface areas of one small sphere to that of the larger sphere?
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volume of large sphere (radius 14cm)
4/3πr^3
4/3× 22/7 ×14^3
volume of smaller sphere (radius 7 cm)
4/3× 22/7 ×7^3
ratio of volumes = 4/3× 22/7 ×14^3 : 4/3× 22/7 ×7^3
THE VOLUMES OF THE SPHERES HAS TO BE SOLVED
4/3πr^3
4/3× 22/7 ×14^3
volume of smaller sphere (radius 7 cm)
4/3× 22/7 ×7^3
ratio of volumes = 4/3× 22/7 ×14^3 : 4/3× 22/7 ×7^3
THE VOLUMES OF THE SPHERES HAS TO BE SOLVED
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