Question

The curved surface area of a cylinder is 7920 sq.cm1.50 per sq.cm and the circumference of the base is 126cm. Find the height of the cylinder

Answer 1

Cylinder CSA=2*22 /7*r*h
44/7*r*h=7920
r*h=1260
2*22 /7*r=126
r=126*7/44
r=441/22
Putting the value of r
441/22*h=1260
h=1260*22 /441
=62.85

Height is 62.85

Answer 2

Answer:

62.85 cm.

Step-by-step explanation:

The curved surface area of a cylinder is 7920 sq.cm

Formula of curved surface area of cylinder = $2 \pi r h$

So  $7920 = 2 \pi r h$ --1

We are also given that circumference of the base is 126cm.

Circumference = $2 \pi r$

So, $126 =2 \pi r$  --2

Substitute the value in 1

$7920 = 126 \times h$

$\frac{7920}{126}=h$

$62.85=h$

Hence the height of the cylinder is 62.85 cm.