Question

Radii of 2 cylinders are in the ratio 3:4 and their heights are in the ratio
6:5, find the ratio of their CSA​

Answer 1

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$\large{\sf {\underline{\underline \blue{Step \: by \: step \: explanation:-}}}}$

★${\bold{\underline \orange{ \: Given -}}}$

⠀⇨$\sf\Large\frac{r_1}{r_2} \: = \: \frac{3}{4}$

⠀⇨$\sf\Large\frac{h_1}{h_2} \: = \: \frac{6}{5}$

★${\bold{\underline \orange{ \: To \: find-}}}$

⠀⇨$\sf\Large\frac{Curved \: surface \: area_1}{Curved\: surface \: area_2}$

★${\bold{\underline \orange{ Solution-}}}$

⇨$\sf\large\ \: Curved \: surface \: area \: = 2πrh$

Now;

⇨$\sf\large\frac{CSA_1}{CSA_2} \: = \: \frac{ 2×π× r_1×h_1}{2×π×r_1×h_1}$

⇨$\large\sf\frac{CSA_1}{CSA_2} \: = \: \frac{18}{20} \: = \: \frac{9}{10}$

⇨$\large\sf\ Ratio \: = \: 9:10$

Answer 2

Here man hope it helps... Mark as Brainliest. Also comment if you think I did something wrong...