Question

A rectangular sheet of paper 40*22cm
Is rooled to form a hollow cyclimder of height 40 cm find the radius of the cylinder

Answer 1

2πr=22

2(22/7)(r)=22

r=7/2=3.5

Answer 2

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The cylinder is rolled along the breadth.
So ,
Circumference of base of the cylinder = Breadth of circle

Radius of cylinder = 3.5 cm

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