a rectangular sheet of paper of size 44cm×12 cm is rolled along its length of from a cylinder find the total surface area of obtained and cylinder
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length= 44cm and width= 12cm after rolled along its length length will be perimeter of circle and width will be height of cylinder. so, perimeter of rectangular sheet of
paper=2(l+b) =2×(44+12)
=2x56
=112cm
therefore, radius of circle of cylinder= perimeter of circle/2π
=44/2TT
=7cm
now, volume of cylinder- Пr^2h
=22x7x7x12/7 =1848 cm^2 answer
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