How many cubic metres is equal to 2000 cubic centimetres?

The correct option is C 0.002
1 metre = 100 centimetres

$\Rightarrow \text{1 cubic metre}=100\times 100\times 100\text{cubic centimetres}\Rightarrow \text{1 cubic centimetre}=\frac{1}{100\times 100\times 100}\text{cubic metres}\Rightarrow \text{2000 cubic centimetres}=\frac{2000}{(100\times 100\times 100}\text{cubic metres}$

Cancelling the three zeroes from the numerator and from the denominator, we have

$\text{2000 cubic centimetres}=\frac{2}{1000}=0.002\text{cubic metres}$