The sum of the radius of two sphere is 10cm. The sum of their volume is 880cm³. Find the product of their radius.
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Step-by-step explanation:
r +R = 10 ( equation 1)
(4/3)×(22/7) × r³ + (4/3) ×(22/7) × R³ = 880
r³+R³ = 210
on cubing of equation 1
(r+R)³ = 1000
r³ + R³ +3rR(r+R) = 1000
210 + 3rR(10) =1000
30rR = 790
rR = 79/3
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