Internal length, breadth and height of a rectangular box are 10 cm, 8 cm and 6 cm, respectively. How many boxes are needed which can be packed in a cube whose volume is 6240 cu. cm.?

A) 12

B) 13

C) 15

D) 17

Correct Answer:

B) 13

Description for Correct answer:

Volume of rectangular box

= \( \Large 10 \times 8 \times 6 = 480 cm^{2}\)

= \( \Large 6240 cm^{3} \)

= \( \Large \frac{Volume \ of \ cubes}{Volume \ of \ rectangular \ box} \)