A rectangular sheet of paper 66cm×20cm is rolled along its length to form a cylinder. Find the volume of the cylinder so formed.

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Solution

The volume of the cylinder = pirrh

The sheet is rolled along the length so the circumfarance of the base will be 20
that is,
2pir = 20
r = 10/pi
So the volulme = pi r * r * h
= pi * 10/pi * 10/pi * 66 (height = 60cm)
= 6600/pi (pi = 3.14)
= 6600/3.14
= 2101.9 cm^2

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A rectangular sheet of paper 66cm×20cm is rolled along its length to form a cylinder. Find the volume of the cylinder so formed.

The volume of the cylinder = pi*r*r*h The sheet is rolled along the length so the circumfarance of the base will be 20 that is, 2*pi*r = 20 r = 10/pi So the volulme = pi * r * r * h = pi * 10/pi * 10/pi * 66 (height = 60cm) = 6600/pi (pi = 3.14) = 6600/3.14 = 2101.9 cm^2

The volume of the cylinder = pirrh

The sheet is rolled along the length so the circumfarance of the base will be 20
that is,
2pir = 20
r = 10/pi
So the volulme = pi r * r * h
= pi * 10/pi * 10/pi * 66 (height = 60cm)
= 6600/pi (pi = 3.14)
= 6600/3.14
= 2101.9 cm^2