Question

to right circular cylinder of equal volumes and their Heights in the ratio 4 : 9 find the ratio of their radii if one right circular cylinder is 4 cm then what is radius other right circular cylinder​

Answer 1

Answer:

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Answer 2

Answer:

Given

Let height are in the ratio 4x and 9x

height = 4cm

To find - Ratio of raddi of other two cylinder

Solution -

According to the question

volume of a cylinder =

$\pi {r}^{2} h$

$\pi {r}^{2} h = \pi {rh}^{2}$

${ \frac{(r1)}{(r2) } }^{2} = \frac{9}{4} = \sqrt{ \frac{9}{4} } = \frac{3}{2}$

But we have to find ratio of the curved surface of their height

2pi rh = 2pirh

$\frac{3}{2} \times \frac{4}{9}$

= 2:3

hey dude your answer is 2:3