a sheet of paper rectangular in shape has dimension 22 cm into 10 cm this can be wrapped exactly once around the curved surface of a cylinder of the height 10 cm find the volume of the cylinder
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length= 22 cm
height= 10 cm
now,
crcumference = 22 cm
2πr = 22
2x(22/7) x r = 22
r = 7/2 = 3.5 cm
curved surface of a cylinder = 2πrh
= 2 x (22/7) x 3.5 x 10
= 220 square cm
total surface area = 220 +2 *(22/7)x 3.5*3.5
total surface area =220 + 77
= 297 square cm
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