Question

The curved surface area of a cylindrical of height 21 cm and base radius 8cm is _​

Answer 1

Answer:

Given,

height of the cylinder, h= 21cm

base radius of the cylinder, r= 8cm

curved surface area of the cylinder =?

we know,

curved surface area of the cylinder = 2πrh

=2× 22/7 × 8 × 21

= 1056cm^2

Answer 2

$\huge\tt\underline{Answer} \\ \\ \mathtt{height \: = 21 \: cm} \\ \mathtt{radius = 8 \: cm} \: \: \: \\ \\{ \green{\underline{\underline{\boxed{\sf{curved \: surface \: area \: of \: cylinder = 2\pi \times radius \times height}}}}}} \\ \\ \rightarrow \: 2 \times \frac{22}{7} \times 8 \times 21 \\ \\ \rightarrow \: 1056 \: \mathtt{cm ^{2}} \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ \mathtt{curved \: surface \: area \: of \: cylinder \: is \:1056 \: cm ^{2} }$