Question

Find the height of a cylinder with a radius of 21 cm and a curved surface area of 3960 cm².​

Answer 1

Answer:

you can use 2pirh formula put value.

Answer 2

Answer:

The height of the Cylinder is 30cm.

Step-by-step explanation:

Given, C.S.A of Cylinder= 3960cm²

Height= 21cm

According to Formula, C.S.A of a cylinder=

$2\pi rh$

Therefore, C.S.A= 2πrh=3960; Taking π as 22/7

We have

$2 \times \frac{22}{7} \times 21 \times h = 3960$

$h = \frac{3960 \times 7}{22 \times 2 \times 21}$

$h = 30cm$

Hope you get this!!