Answers

2014-10-30T14:18:33+05:30
So given \frac{r_1}{r_2}=\frac{2}{3}
and   
             \frac{h_1}{h_2}=\frac{5}{4}

so curved surface are = 2πrh 

So we have to find the ratio of   2πr₁h₁/2πr₂h₂ = r₁h₁/r₂h₂ = 

\frac{h_1}{h_2}*\frac{r_1}{r_2}

= 5/6

so the ratio is 5 : 6 ANSWER


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