exam Maths Puzzle Numerical Ability

a piece of wire is shaped to enclose a square, whose area is 121sq. in. it is then reshaped to enclose a retangle whose length is 13in. What is the area of the retangle in square inches?

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An air sample 4.0 ppm (parts per million) of two pollutants. The concentration of one is four times the other. What are the concentrations? -3w+3greater than or equal to 18