exam Maths Puzzle Numerical Ability

A garden area is 30ft long and 20ft wide. A path of uniform width is set around the edge. If the remaining garden area is 400ft2, what is the width of the path?

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exam Other Question

8pq^2(2pq-3p+5q)

please help me solve this. A coin bank contains only pennies, dimes, and quarters. The value of the coins is $4.49. There are 5 more pennies than quarters. The number of dimes is 1.5 times the number of pennies. Find the number of each coin in the bank.