Question

Q2: The ratio between curved surface area and the total surface area of a right circular cylinder is 1:2
.Find the ratio between the height and radius of the cylinder​

Answer 1

Answer:

The ratio of height and radius of cylinder is 1:1.

Step-by-step explanation:

Given: $\frac{C.S.A. of cylinder}{T.S.A. of cylinder} = \frac{1}{2}$

w.k.t., C.S.A. of right circular cylinder = 2πrh and T.S.A. of right circular cylinder = 2πr(r+h).

⇒ $\frac{2\pi rh}{2\pi r(r+h)} = \frac{1}{2}$

or $\frac{h}{r+h} = \frac{1}{2}$

or 2h = r+h

or 2h-h = r

or h = r

or h/r = 1

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