the radius of a spherical baloon increases from 12 to 16cm as air being pumped into it. find the ration of the surface area of the baloons in the two cases
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Step-by-step explanation:
surface area of ballon(spherical) = πr*r
Area 1= 12*12*π
=144π
Area 2=16*16*π
=256π
ratio= area 1 / area 2
= 144π / 256π
= 9/16
therefore ratio is 9:16
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