GCSE · Compound units & rates

Converting compound units and rates of flowExam-style questions

Why converting a compound unit means converting both of its parts, where the ÷3.6 between km/h and m/s comes from, why g/cm³ to kg/m³ is ×1000, and how rates of flow work.

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13 questions · GCSE (Higher) level · mark scheme and worked solution on each · no sign-up to try

DifficultyAll Level 2 Level 3 Level 4 Level 5

1
A bottling machine fills $750$ ml bottles at a rate of $40$ bottles per minute.

(a) Work out the rate of the machine in litres per hour.

The machine must fill a vat order of $13\,500$ litres.

(b) Work out how long this takes. Give your answer in hours and minutes.
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