exam Maths Puzzle Numerical Ability

find the area of each polygon
-four sided polygons
-side=10cm
-side=12cm
-side=16cm

2nd polygon four sided
-side=10in
-side=24in

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exam Other Question

The length of a rectangular garden is twice its breadth. A square playground measuring 600 m2 occupies one-third of the total area of the garden. The length of the garden in metres is Hi! This is the question:
Is U= The set of all polynomials in P3 with constant term 0, a subspace of P3?

I said yes because 0 lies in U, the addition of any 2 polynomials from