Description : The diameter of a sphere is decreased by 25%. -Maths 9th
Last Answer : Let the original diameter of the sphere be 2x. Then, original radius of the sphere = x Original curved surface area = 4πr2 Decreased diameter of the sphere = 2x - 25% of 2x = 2x - x/2 = 3/2x Decreased ... Hence, percentage decreases in area = 7/4πx2/4πx2 x 100% = 7/16 x 100% = 175/4% = 43.75%