Question

A rectangular sheet a paper of area 11 cm x 50 cm is rolled along its length. Find the radius and the total surface area of cylinder formed​

Answer 1

Answer:

So length is 11cm & 5Ocm

It's rolled in cylinder then.. circumference of cylinder is 11cm,height 5O cm

2πr = 11

2 x22\7 x r = 11

r = 11 x 7 \44

r = 7\4

Total surface area = 2πr(h + r)

2 x 22\7 x 7\4( 5O + 1.75)

44\7 x 7\4(51.75)

11 x 5175\1OO

56925\1OO

569.25cm ²