2017 · Q111
What is the maximal number of spherical balls of radius 1 cm each that can be placed inside a cubical box of height 10 cm?
General Mental Ability, Quantitative Aptitude and StatisticsNumber system and arithmetic
- A25
- B125
- C250
- D1000
Explanation
Each ball has diameter 2 cm, so a 10 cm box fits 10/2 = 5 balls along each edge. The maximum that can be placed is 5 x 5 x 5 = 125 balls. Hence B.