1 Answer

Cathy · Answer 1 · 2022-08-24T21:50:27+0000

$\sf \longrightarrow \: \:Surface \: area \: of \: cylinder \: = \: 2\pi \: r \: h \: + \: 2\pi \: {r}^(2)$

$\sf \longrightarrow \: \: r \: = \: (Diameter)/(2) \\$

$\sf \longrightarrow \: \: r \: = \: (12)/(2) \\$

$\sf \longrightarrow \: \: r \: = \: \cancel(12)/(2) \: \: ^(6) \\$

$\sf \longrightarrow \: \: r \: = \:6 \: ft$

$\sf \longrightarrow \: \: h \: = \: 15 \: ft$

$\sf \implies \: \:2 \: * \: \pi * \: 6 \: * \: 15 \: \: + \: \: 2 \: * \: \pi * \: {6}^(2)$

$\sf \implies \: \:2 \: * \: \pi * \: 90 \: \: + \: \: 2 \: * \: \pi * \: 36$

$\sf \implies \: \:180 \: \pi \: + \: \: 72 \: \pi$

$\sf \implies \: \:252 \: \pi$

Hence, the surface area of cylinder is 252 π ft²

Please log in or register to add a comment.