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Question
Q. :- Find the formula of area and actual area of the curved surface area of a cylinder ,where, radius of cylinder= 63 meters, and height of cylinder = 6 meters
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Step : 1
when a hollow cyliner is cut length-wise, it turns into a rectangular sheet, with height of the rectangle= height of the cylinder, and width of the rectangle = perimeter of the cirlular base of the cylinder = (44/7) x rdius of the cylinder
So, area of the curved surface of the cylinder = area of the rectangle made by cutting the cylinder length-wise
Width of the rectangle x Height of the rectangle
(44/7) x Radius of the cylinder x Height of the cylinder
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Step : 2
when a hollow cyliner is cut length-wise, it turns into a rectangular sheet, with height of the rectangle= height of the cylinder = 6 , and width of the rectangle = perimeter of the cirlular base of the cylinder = (44/7) x rdius of the cylinder = 396
So, area of the curved surface of the cylinder = area of the rectangle made by cutting the cylinder length-wise
6 x 396 = 2376
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