A biscuit recipe that Priya's grandmother wrote out by hand needs 350 g of flour to make 12 biscuits. Priya wants to bake 30 biscuits for a family gathering...
Question 1 Report
A biscuit recipe that Priya's grandmother wrote out by hand needs 350 g of flour to make 12 biscuits. Priya wants to bake 30 biscuits for a family gathering next weekend.
- Work out how many grams of flour Priya needs. (2)
- Write your answer to part (a) in kilograms. (1)
Answer Details
This question tests scaling a recipe quantity up to a different number of items and converting the result between grams and kilograms.
- The flour needed per biscuit is found by dividing the original recipe amount by 12, then multiplying by the new number of biscuits: \(350 \div 12 \times 30 = 875\) g [2 marks].
- Since there are 1000 g in a kilogram, \(875\) g \(= 0.875\) kg [1 mark].
Scaling a recipe means multiplying every ingredient by the same ratio of new quantity to original quantity, here \(\frac{30}{12}\), rather than adding a fixed extra amount.
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