A rectangular paper of length 20 cm and width 14 cm is revolved along its width and a cylinder is formed. Find the volume of the cylinder. Please explain each term!
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Let l and b be the sides of rectangle which is 20cm and 14 cm respectively.
If we revolve the paper along its width, then-
b=circumference of the base=2πr
l=height of the cylinder=h=20 cm
If 2πr=14
So, r= 49/22
Volume of the cylinder=πr^2h
V=22/7×49/22×49/22×20
V=311.81 cm^3
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