Question

How many cubes of edge 4cm, each can be cut from cuboid whose length, breadth and height are 20 cm, 18 cm and 16 cm respectively.

Answer 1

No. of cubes $=\frac{Volumeofcuboid}{Volumeofsmallcube}$

$=\frac{20\times 18\times 16c{m}^3}{4\times 4\times 4c{m}^3}$

$=5\times 18=90cubes$