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What is the total surface area of an iron sphere having a radius of 11 cm?(a) 1529.76 cm^2(b) 1514.76 cm^2(c) 1519.76 cm^2(d) 1419.76 cm^2This question was posed to me in an online interview.This is a very interesting question from Surface Area and Volume of Different Solid Shapes in chapter Surface Area and Volumes of Mathematics – Class 10

Answer»

Correct CHOICE is (c) 1519.76 cm^2

The EXPLANATION: The total surface area of an iron SPHERE = 4πr^2

= 4 × \(\FRAC {22}{7}\) × 11^2

= 1519.76 cm^2



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