Question

A rectangular sheet of paper 40 cm x 22 cm, is rolled to form a hollow cylinder of height 40 cm
What is the radius of the cylinder (in cm).​

Answer 1

Answer:

According to question,

Height of cylinder = 40cm

Let radius of cylinder be r

And circumference of base =22cm

⇒ 2πr=22cm

⇒2.

7

22

.r=22

⇒ r=

2

7

cm

Hence , radius =3.5cm