Q: A solid spherical ball made of iron is melted and two new balls are made whose diameters are in the ratio of 1 : 2. The ratio of the volume of the smaller new ball to the original ball is
(a)1 : 3
(b)1 : 5
(c)2 : 9
(d)1 : 9
Correct Answer: (d)
The correct answer is (c) '2 : 9'. This question from the Quantitative Aptitude & Data Interpretation domain tests knowledge of Numerical Ability.