A rectangular sheet of a paper 40cm×22cm is rolled to form a hollow cylinder of height 40cm.find the radius of the cylinder
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breadth becomes the circumference of base of circle
then, circumference = 22cm
2πr=22
2×22/7×r=22
r=22×7/2×22
r=7/2
then, circumference = 22cm
2πr=22
2×22/7×r=22
r=22×7/2×22
r=7/2
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