Question

a rectangular paper of dimensions 22cm×8cm is formed into a hollow cylinder by rolling ot along its length. find the radius of the cylinder.

Answer 1

Answer:

1.27 cm

Step-by-step explanation:

The paper is rolled along the length

⇒ the breadth of the paper is the circumference

Find the radius

Circumference = 2πr

8 = 2πr

r = 8 ÷ 2π

r = 14/11 or 1.27 cm

Answer: The radius is 1.27 cm

Answer 2

Answer:

radius = 11.71 cm

Step-by-step explanation:

Given That:

length of rectangle=22 cm

width of rectangle=8 cm

To find:

radius cylinder=?

Solution:

we know that

Diagonal length of rectangle=diameter of rectangle

so

diameter=√22²+8²

diameter=23.04

so,

radius of cylinder=diameter/2

radius of cylinder=23.41/2 cm

radius of cylinder=11.71 cm