a rectangular sheet of paper 44 cm × 20 cm is rolled along its length to form a cylinder find volume of cylinder so formed
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222
Given,length of the rect.=44cm
Breath of the rect.=20cm
Now since it has been rolled along its length,therefore
h of the cylinder =20cm
Circumference=>44=2πr
=>22= 22/7 * r
=> r =7 cm
According to the question,
Vol of the cylinder= πr^2h
= 22/7 * 7 * 7 * 20
=3080cm^3
Breath of the rect.=20cm
Now since it has been rolled along its length,therefore
h of the cylinder =20cm
Circumference=>44=2πr
=>22= 22/7 * r
=> r =7 cm
According to the question,
Vol of the cylinder= πr^2h
= 22/7 * 7 * 7 * 20
=3080cm^3
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19
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