Question

a unit of volume with dimensions 1 unit × 1 unit × 1 unit

Answer 1

Do:

$V=1u.1u.1u=1u^3$

Answer 2

V=Length*Height*Depth

Length=1 unit

Height=1 unit

Depth=1 unit

Therefore:

V= (1 unit)*(1 unit)*(1 unit)=1 unit³