Question

A cuboid is of length 4.2 m, breadth 1.4 m, and height 1.2 m. Find the number of cubes, each of edge 20 cm, that can be cut from the cuboid

Answer 1

Explanation:

l= 4.2 m = 4.2 * 100 = 420 cm

b = 1.4 m = 1.4*100 = 140 cm

h =1.2 m =1.2 *100 =120 cm

Volume of cuboid = l*b*h = 420 * 140 * 120 = 705600 cubic cm

Volume of cube = a*a*a = 20*20*20 = 8000 cubic cm

No.of cubes = Volume of cuboid / volume of cube

= 705600 / 8000 = 882 cubes

or 420*140*120 / 20*20*20 = 42*14*12/2*2*2 = 21*7*6 = 882 cubes