exam Maths Puzzle Numerical Ability

A ladder 40 ft long leans against a building and reaches a ledge. The foot of the ladder is 16 ft from the building. How high is the ledge?

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exam Other Question

Please help me find the perimeter of a Parallelogram inscribed in a circle.
Here is the Question:
EFGH is a Parallelogram. Arc HG=120degrees, Radius of the circle=6, Find the pe Add. Express your result in simplest form.
4/xy + 6/xy
My answer is: 10/ x^2 y^2 am I right?