SOLUTION: the diameter of the larger ball is 1.25 times greater than the smaller ball. how do the surface areas of the to balls compare.

Question 820507: the diameter of the larger ball is 1.25 times greater than the smaller ball. how do the surface areas of the to balls compare.
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
D/d = 1.25/1
D = 1.25d
2R = 1.25(2r)
R = 1.25(2r)/2
R = 1.25r
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R/r = 1.25
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A = 4 pi RR
a = 4 pi rr
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A/a = RR/rr
A/a = (R/r)(R/r)
A/a = 1.25*1.25
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A/a = 1.5625
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