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450g of flour costs £1.44 - OCR - GCSE Maths - Question 8 - 2023 - Paper 1

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450g of flour costs £1.44. Work out the cost of 1 kg of this flour.

Worked Solution & Example Answer:450g of flour costs £1.44 - OCR - GCSE Maths - Question 8 - 2023 - Paper 1

Step 1

Calculate the cost per gram of flour

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Answer

To find the cost per gram, divide the total cost by the weight in grams:

Cost per gram=£1.44450g=£0.0032/g\text{Cost per gram} = \frac{£1.44}{450g} = £0.0032/g

Step 2

Convert kilograms to grams and calculate total cost for 1 kg

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Answer

Since 1 kg is equal to 1000 grams, we can find the cost for 1 kg by multiplying the cost per gram by the total grams in 1 kg:

Cost for 1 kg=£0.0032/g×1000g=£3.20\text{Cost for 1 kg} = £0.0032/g \times 1000g = £3.20

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