GCSE Maths Practice: compound-measures

\( \begin{array}{l} \text{A tap fills 18 litres in 3 minutes.} \\ \text{Flow rate?} \end{array} \)

Choose one option:

\( \text{6 litres/minute} \) \( \text{5 litres/minute} \) \( \text{7 litres/minute} \) \( \text{4 litres/minute} \)