Question

Perimeter of a base of a cylinder is 14cm and height of the cylinder is 10cm then the lateral surface area of a cylinder is

Answer 1

$\Longrightarrow{\boxed{\bold{Answer: 140\:cm^2}}}$

$\textbf{\underline{Step-by-step explanation :- }}$

Circumference of base = 2πr

Circumference of base = 14 cm

14 cm = 2πr

Now, instead of solving the equation to obtain value of r, we will substitute the respective values.

Now, lateral surface area = 2πrh

Since height of cylinder 10 cm and value of 2πr is 14 cm

= 14 cm × 10 cm

$\huge{\bold{\underline{=\:140\:cm^2}}}$