Final answer:
The cost of 1 kg of grapes is £3.12.
Step-by-step explanation:
To find the cost of 1 kg of grapes, we need to find the cost of 0.5 kg of grapes and then double it. The total cost of grapes and apples is £3.12. So, let's find the cost of 0.5 kg of grapes. We can set up a proportion to solve for the cost of grapes:
0.5 kg grapes / £x = £3.12 / 1 kg grapes
Using cross multiplication, we get:
0.5 kg grapes * £3.12 = £x * 1 kg grapes
Simplifying, we find that the cost of 0.5 kg of grapes is £1.56. Doubling this gives us the cost of 1 kg of grapes, which is £3.12. Therefore, the answer is d) £1.56.
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