exam Maths Puzzle Numerical Ability

A rectangle has an area of (16p^2-40pr+25r^2)

Find the dimensions of the rectangle.

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exam Other Question

The diameter of circle AOB is 12, Triangle ABC is inscribed in the circle, angle A = 45. In cm squared what is the area of Triangle ABC,
a) 18
b) 108
c) 144
d) 36
or e) 72 A plane flies 480 miles with the wind and 320 miles against the wind in the same length of time. If the speed of the wind is 28mph, what is the speed of the plane in still air?