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let radius of sphere 1 = r1 radius of sphere 2 = r2 Given, r1 = 2 r2 surface area of sphere 1 = volume of sphere 2 4π(r1)2 = 4/3 π(r2)3 r1 = 2 r2 4π(2r2)2 = 4/3 π(r2)3 4 = 1/3(r2) r2 = 12 r1 = 2 r2 = 2 × 12 = 24
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