# The ratio between the curved surface area and total surface of a right circular cyclinder is 1:2.Find the ratio between the height and radius

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ratio of curved surface area(c.s.a) and total surface(t.s.a) of a right circular cyclinder = 1:2

2πrh / 2πr(r+h) = ½

h/(r+h) = ½ (2πrh on the both sides will be cancelled)

2h = r+h (by cross multiplying)

2h-h = r

therefore h=r

therefore height of cylinder = radius of cylinder

= 1:1