Question

A cylinder is formed by folding a rectangular sheet along its breadth. If the
length of sheet is 10 cm and its breadth is 22 cm, then find the radius of the

cylinder. (Take =22/7
​

Answer 1

Answer:

2772cm

3

If the sheet is rolled along its length then the circumference will be equal to the length of the rectangle.

∴2πr=44

∴r=

2×

7

22

44

∴r=7 cm

Also, height of the cylinder will be equal to the breadth of the rectangle.

∴h=18 cm

∴ volume of the cylinder =πr

2

h

=

7

22

×7

2

×18

=2772 cm

3