This question is Based on Mensuration Chapter of M.L Aggarwal book for ICSE BOARD for class 10.

In this question you have to find the diameter of a sphere whose surface area is given.

This is the Question Number 05, Exercise 17.3 of M.L Aggarwal.

Deepak BoraNewbie

# Find the diameter of a sphere whose surface area is 154 cm square .

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Given surface area of the sphere = 154 cm^{2}Surface area of the sphere = 4r^{2}4×(22/7)×r^{2}= 154r^{2}= 154 ×7/(22×4)= 49/4r = √49/2Diameter = 2×r = 2×√49/2 = √49 = 7Hence the diameter of the sphere is 7 cm.