Question

the radius of a cylinder is12m and height is 21m find the lateral surface area of the cylinder​

Answer 1

Question :-

The radius of a cylinder is 12 m and height is 21 m. Find the curved surface area of the cylinder.

Answer :-

Given :-

• r = 12 cm
• h = 21 cm

To Find :-

• Curved surface area ( CSA )

Solution :-

Curved surface area of cylinder = 2πrh

Substituting the values in formula :-

→ $\sf CSA = 2 \times \frac{22}{\cancel7} \times \cancel21$

→ $\sf CSA = 2 \times 22 \times 3 \times 12$

→ $\sf CSA = 1584$

Curved surface area = 1584 m²

$\boxed{\begin{minipage}{6.2 cm}\bigstar \:\underline{\textbf{Formulae Related to Cylinder :}}\\\\\sf {\textcircled{\footnotesize\textsf{1}}} \:Area\:of\:Base\:and\:top =\pi r^2 \\\\ \sf {\textcircled{\footnotesize\textsf{2}}} \:\:Curved \: Surface \: Area =2 \pi rh\\\\\sf{\textcircled{\footnotesize\textsf{3}}} \:\:Total \: Surface \: Area = 2 \pi r(h + r)\\ \\{\textcircled{\footnotesize\textsf{4}}} \: \:Volume=\pi r^2h\end{minipage}}$

Answer 2

Answer:

1584m^2

Step-by-step explanation:

H=21m,R=12m ,C.S.A.=2×22/7×12×21=1584m^2