A rectangle sheet of paper 44 cm × 18 cm is rolled once along its length and a cylinder is formed. The volume of the cylinder so formed is equal to
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 A2772cm3 Let the radius of cylinder be ‘r’ cm height, h = 18 cm
Circumference of base of cylinder = 44 cm ⇒2πr=44 ⇒2×227×r=44 ⇒r=44×744 ∴r=7cm
Volume of the cylinder formed =πr2h=227×7×7×18 =2772cm3