Question

Consider a cylinder having diameter 10cm and height 20cm find total surface area of cylinder​

Answer 1

Given :-

• diameter of cylinder =10 cm

• radius of cylinder =5 cm

• height of cylinder = 20 cm

To find :-

• Total surface area of cylinder

Formulae used :-

$\fbox \red{ \sf{ \:Total \: surface \: area \: of \: cylinder\: = \:2\pi r h \: \times \: 2\pi {r}^{2} }}$

Solution :-

$\ \ \: { \sf{ \:Total \: surface \: area \: of \: cylinder\: = 2 \times \frac{22}{7} \times 5 \times 20 + 2 \times \frac{22}{7} \times {5}^{2} }} \\ \\ \ \: { \sf{ \implies 628.57 {cm}^{2} \: + \:157.14 {cm}^{2} }} \\ \\ \: { \sf { \implies \:785.71 {cm}^{2} }}$

Hence,

Total surface area of cylinder = 785.71cm²

Answer 2

Answer:

$\huge\blue{\boxed{\red{\mathfrak{\overbrace{\underbrace{\fcolorbox{red}{cyan}{\underline{\red{✯answer✯}}}}}}}}}$

A≈785.4cm²

d Diameter 10cm

h Height 20cm

A=2πd

2h+2π(d/2)2=2·π·10

2·20+2·π·(10/2)2

≈

785.39816cm²

$\huge\boxed{\fcolorbox{black}{yellow}{HOPE\: IT \: HELPS}}$