Question

the radii of two right circular cylinders are in the ratio 2:3 and ther heights are in the ratio 5:4. Calculate the ratio of their curved surface areas

Answer 1

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

Answer 2

Answer:

Step-by-step explanation: