The ratio of total surface area to lateral surface area of a cylinder whose radius is 20 cm and height 50 cm, is -

Question: The ratio of total surface area to lateral surface area of a cylinder whose radius is 20 cm and height 50 cm, is - Solution: Total surface area / Lateral surface area = (2πrh + 2πr2) : 2πrh = (h +r) : h= 70 : 50= 7 : 5