Question

Find the cube of 0.3 .

Answer 1

 We have:  \[0 . 3 = \frac{3}{10}\]

Also,

\[\left( \frac{m}{n} \right)^3 = \frac{m^3}{n^3}\]

∴  \[\left( \frac{3}{10} \right)^3 = \frac{3^3}{{10}^3} = \frac{3 \times 3 \times 3}{10 \times 10 \times 10} = \frac{27}{1000} = 0 . 027\]