exam Maths Puzzle Numerical Ability

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

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exam Other Question
The fuel for a two-cycle motorboat engine is a mixture of gasoline and oil in the ratio of 15 to 1. How many liters of each are in 6.6 L of mixture ? Solve the graph.
x + 11 < -2 or x + 11 > 4

Help me please.