Radii of two spheres are 3 cm and 27 cm respectively. What is the ratio of surface area of the first sphere to the surface area of the second sphere?
(A) 1:9
(B) 1:27
(C) 1:16
(D) 1:18
(E) None of the above
Surface area of the first sphere
Surface area of the second sphere
Ratio
Hence, the answer is (A).
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