exam Maths Puzzle Numerical Ability

the length of a rectangle is twice the width. the area is 72 square centimeters, what is the length

A. 48 cm
B. 24 cm
C. 12 cm
D. 6 cm

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exam Other Question

I am lost on this one

3X^2-x-4<_0

thanks for your consideration The base of an isosceles triangle is 3cm less than the length of the equal sides. If the perimeter of the triangle is 36cm, find the length of each side.