Question

a metal block measures 10cm * 2cm * 2cm . what is its volume how many blocks each 2cm * 2cm * 2cm have the same total volume

Answer 1

The volume of the block is

$$V=10\cdot2\cdot2=40\text{ cm}^3.$$

The volume of one small block is

$$v=2\cdot2\cdot2=8\text{ cm}^3.$$

How many small blocks do we need to make one large?

$$N=\frac Vv=\frac{40}{8}=5.$$