The radii of two cylinders are in the ratio of 4 : 5 and their heights are in the ratio of 5 : 2. The ratio of their volume is:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 8 : 5.
r1 : r2 = 4 : 5 and,
h1 : h2 = 5 : 2
Volume of cylinder = πr2h
here, r = radius and h = height
⇒ π × r12 × h1 : π × r22 × h2
⇒ 42 × 5 : 52 × 2
⇒ 16 × 5 : 25 × 2
⇒ 8 : 5