Question
If the diameter of the cylinder is 14 cm and height of
the cylinder is 2cm. Find the sum of the curved surface are and total surface area?Solution
Diameter = 2r = 14 r = 14/2 = 7cm Curved surface area = 2Ï€rh = 2 x 22/7 x 7 x 2 = 88 cm2 Curved surface area = 2Ï€r(h + r) = 2 x 22/7 x 7x (2 + 7) = 396 cm2 Required answer = 88 + 396 = 484 cm2
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