Question

a rectangular pieces of paper is 22cm in length and 10 cm in width . it is rolled into a cylinder along its length . find the surface area of this cylinder.​

Answer 1

Answer:

Here,length of paper = Circumference = 22 cm. Width of paper = height of cylinder = 10 cm. Then, Circumference = 22 cm => 2πr = 22

Answer 2

Answer:

Solution:

L=22cm b= 10cm

Circumference of circle=L=22cm (2π rh)

height=10cm

Surface area of cylinder=2 π rh

=22×10

=220cm square