If the radius of a sphere is 3a, find its surface area
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Answer:
Here's the answer
Step-by-step explanation:
A=4πr2=4·π·32≈113.09734
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Step-by-step explanation:
Radius of sphere=3a
we know surface area of sphere = 4πr²
=4×π×3a×3a
=4 × π× 9a²
=36πa² squnits.
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