Question

what is area of surface of the cylinder if hight is 13 cm of radius is 8.5​

Answer 1

Answer :

• 1148.53 cm²

━━━━━━━━━━━━━━━━━━━━━━━━━

$\begin{gathered}\begin{gathered}\pink{ \frak{Given}} \begin{cases} \sf \: Height\:= 13\: cm \\ Radius \: = \: 8.5 \: cm \sf \end{cases} \\ \\\end{gathered}\end{gathered}$

━━━━━━━━━━━━━━━━━━━━━━━━━

━━━━━━━━━━━━━━━━━━━━━━━━━

$\huge\color{red}{Formula:-}$

$\begin{gathered}\begin{gathered}: \implies \underline{ \boxed{\displaystyle \sf \bold{\: 2 \pi \: r \: ( Radius\: + \: Height ) }} }\\ \\\end{gathered}\end{gathered}$

━━━━━━━━━━━━━━━━━━━━━━━━━

━━━━━━━━━━━━━━━━━━━━━━━━━

$\begin{gathered}\begin{gathered}\\ : \implies \displaystyle \sf \: 2 \times \frac{22}{7} \times 8.5 \: (8.5 \: + \: 13 \: )\\ \\ \\\end{gathered}\end{gathered}$

$\begin{gathered}\begin{gathered}\\ : \implies \displaystyle \sf \: 53.42 \: \times \: 21.5\\ \\ \\\end{gathered}\end{gathered}$

━━━━━━━━━━━━━━━━━━━━━━━━━

$\mathrm{\boxed{\boxed{\pink{→ \:1148.53\: cm²✔}}}}$

━━━━━━━━━━━━━━━━━━━━━━━━━