Final answer:
The cost of one pineapple is determined by subtracting the change received (£3.60) from the amount paid (£5.00) to find the total cost (£1.40) for two pineapples, and then dividing that total cost by two. One pineapple costs £0.70.
Step-by-step explanation:
To find out how much one pineapple costs, we use the information that two pineapples are bought with a £5 note and £3.60 is given back as change. First, we subtract the change from the amount paid to find the total cost of two pineapples. Then, we divide the total cost by two to find the cost of one pineapple.
£5.00 (amount given) - £3.60 (change) = £1.40 (total cost of two pineapples)
Now we divide the total cost of two pineapples by 2 to find the cost of one pineapple:
£1.40 / 2 = £0.70
So, the cost of one pineapple is £0.70.