Question

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

Answer 1

Answer:

The radius of the of the cylinder is 3.5 cm.

Step-by-step explanation:

It is given that a rectangular sheet of paper 40cm and 22cm is rolled to form a hollow cylinder of height 40cm.

It means one dimension will be the height of the cylinder and another dimension will be the circumference.

Since the height of the cylinder is 40 cm, therefore the circumference of the cylinder is 22 cm.

2*pi*r=22

2*22/7*r=22

44/7*r=22

r=22*7/44

=>r=3.5

Therefore the radius of the of the cylinder is 3.5 cm.