calculate the surface area of a sphere of radius 7cm [Take π = 22/7]

Assessment: WAEC SSCE - General Mathematics - 1990 (Objective) Subject: General Mathematics

Question 1 Report

calculate the surface area of a sphere of radius 7cm [Take π = 22/7]

Answer Details
The surface area of a sphere can be calculated using the formula: Surface area = 4πr2 where r is the radius of the sphere. Substituting r=7cm and π = 22/7, we get: Surface area = 4 x (22/7) x 72 cm2 Surface area = 4 x (22/7) x 49 cm2 Surface area = 616 cm2 Therefore, the surface area of the sphere is 616cm2. So the answer is 616cm2.

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