SOLUTION: What happens to the surface area of a sphere if the diameter is tripled?

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Question 35912: What happens to the surface area of a sphere if the diameter is tripled?
Answer by venugopalramana(3286) About Me  (Show Source):
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What happens to the surface area of a sphere if the diameter is tripled?
SURFACE AREA =PI*D^2
IF D IS TRIPLED THEN
S.A.=PI*(3D)^2=9PI*D^2
HENCE SURAFACE AREA INCREASES 9 TIMES