Question

A cuboid is made with plasticine of sides 5 cm, 2 cm and 5 cm. How many such cuboids will be needed to form a cube?

Answer 1

Dimensions of cuboid are 5 cm, 2 cm and 5 cm.
L.C.M. of 5, 2 and 5 = 10
Since; $5\times 2=10$
$$\begin{gathered} 2\times 5=10 \\ 5\times 2=10 \end{gathered}$$
Hence the number of cuboids required to form a cube = $2\times 5\times 2=20$
Hence, by using 20 cuboids, we can form a cube with side 10 cm each.