The surface area of a sphere is A pi cm^2

A = 1296, B = 7776 ⇒ r = 18

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4pi*18² = 1296pi

(4/3)pi*18³ = 7776pi

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The surface area of a sphere is A pi cm^2 and the volume of the sphere is B pi cm^3 where both A and B are four-digit whole numbers. Find the radius of the sphere.

The radius must be divisible by 3.