Answers

2016-03-27T00:12:49+05:30
Vol. of hemisphere=  \frac{2}{3} 
 π r³
⇒ratio=27:125
  \frac{2}{3}  π (r₁)³:  \frac{2}{3}  π (r₂)³
⇒(r₁)³:(r₂)³=27:125
r₁:r₂=3:5
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2016-03-27T01:07:00+05:30
Volume is ⅔πr³
so ⅔πr1³: ⅔πr2³=27:125
r1: r2 = 3:5

Ans. 3:5
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