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Question

A rectangular sheet of paper 44 cm ×18 cm is rolled along its length and a cylinder is formed. The volume of the cylinder so formed is equal to (Take π=227):

A
2772cm3
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B
2506cm3
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C
2460cm3
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D
2672cm3
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Solution

The correct option is A 2772cm3
If the sheet is rolled along its length then the circumference will be equal to the length of the rectangle.
2πr=44
r=442×227
r=7 cm
Also, height of the cylinder will be equal to the breadth of the rectangle.
h=18 cm
volume of the cylinder =πr2h
=227×72×18
=2772 cm3

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