Question

Find the surface area of a cylinder whose diameter is 42 cm and its height is 150 cm.​​

Answer 1

Solution:

Diameter= D =42cm

Radius= r =21cm

Height= h =150cm

The surface area of the cylinder=?

Formula for surface area

$= 2\pi \: r(h + r)$

=2×22/7×21 (150+21) (putting the values)

=2×22×3(171)

=22572cm^2

Thus surface area of cylinder is 22572cm^2