The internal base of a rectangular box is 15 cm long and `12 (1)/(2)` cm wide and its height is ` 7 (1)/( 2)` cm . The box is filled with cube each of side ` 2(1)/(2)` cm . The number of cubes will be

Options

A. 90
B. 120
C. 45
D. 60

Answer

A