Question

If the circumference of base of a cylinder of height 5 cm is 22cm, then C.S.A of the cylinder is ​

Answer 1

Answer:

Step-by-step explanation:

circumference= 2πr

22= 2πr.

22/2= 22/7×r.

11×7= 22r.

r= 77/22=7/2=3.5cm.

Now, lateral surface area of a cylinder= 2πrh.

= 2×22/7×35/10×10.

= 10×22= 220cm^2.

Hope it helps...

Answer 2

Given :-

If the circumference of base of a cylinder of height 5 cm is 22cm,

To Find :-

CSA

Solution :-

Let the radius be r

Circumference = 2πr

22 = 2 × 22/7 × r

22 × 7/2 × 22 = r

7/2 = r

Now,

CSA = 2πrh

CSA = 2 × 22/7 × 7/2 × 5

CSA = 22/7 × 7 × 5

CSA = 22 × 35

CSA = 770 cm²