Find the ratio of the total surface area of a cylinder to its lateral surface area whose radius is 20 cm and height 60 cm.
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Hey mate here is your answer .
Height of the cylinder = 60 cm
Radius of the cylinder = 20 cm
Ratio of total surface area to lateral surface area = (2×22÷7×20×60) ÷ (2×22÷7×20×60 + 2×22÷7×20×20 ) = 3/4 i.e. 3:4
The ratio is 3:4 .
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