exam Maths Puzzle Numerical Ability

How to slove matrice word problems and set them up, how to find an inverse of a martice, and the determinate of a matrice, by using the expanding rule, also how to create a martice

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the area of square field is 5184 m. square. a rectangular field , whose length is twice its breadth has its perimeter equal to the perimeter of the square field . find the area of the rectangular field. A runner can run 100 yards in 9.8 seconds and 440 yards in 49 seconds. What is the ratio of her average speed in the 440 to her average speed in the 100?