Question

Find the surface area of a cylinder

whose radius is 5 cm and whose
height is 10 cm.
Round to the nearest whole number.
[?] cm2

Answer 1

Question:-

Find the surface area of a cylinder

whose radius is 5 cm and whose

height is 10 cm.

Answer:-

Given:-

`\bullet` Radius of a cylinder (r) is 5 cm

`\bullet` Height of a cylinder (h) is 10 cm

To Find:-

The surface area of a cylinder

Solution:-

We know the formula of surface area of a cylinder is –

`{ \boxed{\rm \red {2πr² \: + \: 2πrh}}}`

So, putting the value of r = 5 cm and h = 10 cm we get,

2πr(r + h) = 2 ×
`(22)/(7)` × 5(5 + 10)

=
`(220)/(7)`(5 + 10)

=
`(220)/(7)` × 15

=
`(220 \: × \: 15)/(7)`

=
`(3300)/(7)`

= 471.43 cm²

The surface area of a cylinder is 471.43 cm². [Answer]