Explanation:
- Cost of 11 cushions = £ 55
Firstly , Find the cost of 1 cushion. Fo the cost of 1 cushion , the cost of 11 cushions is divided by 55.
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Since , the cost of 19 cushions is more than that of 1 cushion. So, the cost of 1 cushion is multiplied by 19.
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