Practice | Hashtable

1. The radii of the bases of two cylinders are in the ratio 3 : 4 and their height are in the ratio 4 : 3. The ratio of their volume is :

A. 2 : 3

B. 3 : 2

C. 3 : 4

D. 4 : 3

Solution:

Let their radii be 3x, 4x and heights be 4y, 3y
Ratio of their volumes :

\begin{aligned} = \frac{π \times {(3 x)}^{2} \times 4 y}{π \times {(4 x)}^{2} \times 3 y} \\ = \frac{36}{48} \\ = \frac{3}{4} O r 3 : 4 \end{aligned}

You must login to add comments. Login now.