Find the ratio between total surface area and curved surface areagiven that height and radius are 7.5 cm and 3.5 cm
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Find the ratio between total surface area and curved surface areagiven that height and radius are 7.5 cm and 3.5 cm.
SOLUTION
radius = 3.5 cm, height = 7.5 cm
Curved Surface Area of cylinder is 2πrh
= 2x22/7 x3.5 x7.5
= 165 cm^2
Total Surface Area = 2π*r*(h+r)
= 2 x22/7 x 3.5(3.5+7.5)
= 242cm^2
ratio between total surface area and curved surface area
= >242 : 165
= >22 :15
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