Question
Fri March 09, 2012 By:

The volume of 2 spheres are in the ratio of 64:27. Find the radii, If the sum of the radii is 21cm?

Expert Reply
Fri March 09, 2012
It can be seen that V1/V2 = r13/r23 = 64/27
So
r1/r2 = 4/3
Now Let r1 = 4x , r2 = 3x
So r1+r2 = 21
x = 3
r1 = 12 , r2 = 9
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