Question

A rectangular sheet of paper 40cm×22cm is roled to form a hollow cylinder of height 40cm fint the radius of the cylinder

Answer 1

Answer : r=3.5cm

Step-by-step explanation:

h = 40 cm

when the sheet is rolled 22 cm becomes the circumference of the base circles.

circumference = 22 cm

2 π r = 22 cm

2×22/7×r = 22 cm

r = 22×1/2×7/22

r = 7/2

r = 3.5

Hope it helped