GCSE Maths Practice: inverse-proportion

Question 1 of 10

Find the time when using more machines.

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\( \begin{array}{l} \text{10 machines take 18 minutes to produce 300 items.} \\ \text{How long would 15 machines take to produce the same number?} \end{array} \)

Choose one option:

\( \text{10 minutes} \) \( \text{12 minutes} \) \( \text{15 minutes} \) \( \text{18 minutes} \)

Inverse proportion: increasing machines reduces time, total work constant.