The ratio of radii of two cones is 3 : 5 and the ratio of their height is 5 : 4, then the ratio of their volumes is:
Answer & explanation
Correct answer: option 2
Ratio of radii = R1 : R2 = 3 : 5
Ratio of height = H1 : H2 = 5 : 4
Ratio of volumes = \(\frac{1}{3}\) \(\pi \) R12H1 : \(\frac{1}{3}\) \(\pi \) R22H2
= R12H1 : R22H2
= (3)2 . 5 : (5)2 . 4
= 9 : 20