Question

A rectangular piece of paper is 22cm in length and 10 cm in width if it is rolled into a cylinder along its length find the surface area of the cylinder find the cost of the paper @ rupees 15 per metre square.
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Answer 1

Length = 22cm

Width = 10cm

Perimeter of the base of the cylinder = 22cm

Let the radius of the cylinder be r

2πr = 22

r = 22 × 7/22 × 1/2

r = 3.5cm

Height of cylinder = 10cm

Surface area = 2πrh

= 22 × 10

= 220

= $220 cm ^{2}$

Cost of paper = 15 × 220/10000

= Rs. 0.33

Hope this helps you :)

Answer 2

here is the answer

thanks for asking