Last time this problem was asked in 2017 cbse board exam. Question number 1 in RS Aggarwal book page number 809, exercise 17B, chapter volume and surface area of solid.
Deepak BoraNewbie
A solid metallic cuboid of dimensions 9 m × 8 m × 2 m is melted and recast into solid cubes of edge 2 m. Find the number of cubes so formed.
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Given,
The volume of solid metallic cuboid is 9 ×8 ×2
= 144 m³
This cuboid has been re-casted into solid cubes of edge 2 m whose volume is given by
2³ = 8 m³
∴ The total number of cubes so formed = the volume of solid metallic cuboid / the volume of solid cubes
= 144 / 8
= 18
∴ 18 cubes are formed