book Maths Puzzle Numerical Ability

A rectangular playground is being constructed using a barn as one side and 80 meters of fencing to form the other three sides. What is the maximum area of such an enclosure?

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book Other Question

5/cubed root of (5x)^2 Mrs. Fisher is playing "classify that number" with her math class. what type of number is named by PI.

a. irrational number
b. rational number
c. integer
d. whole number