Twice of radius

How many times does the surface of a sphere decrease if we reduce its radius twice?

Correct answer:

n =  4

Step-by-step explanation:

S1=4 π r2 S2 = 4 π (r/2)2 S2 = 4 π r2/4 = S1 / 4  n = S1 / S2 n=4



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