the ratio of lateral surface area to total surface area of a cylinder with base diameter 1.6m and height 20cm is
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Answer:
base. diameter = 1.6;m
base radius = 1.6/2 = 0.8 m = 80 cm
lateral surface area of cylinder is 2πrh
= 2π*80*20
= 3200π cm^2
total surface area = 2πrh + 2πr^2
= 3200π + π 80*80
= 3200π + 6400π
= 9600π
ratio = 3200π / 9600π
= 1/3
= 1 : 3
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