exam Maths Puzzle Numerical Ability

A roof is shaped like a rectangle with a length that is twice the width and an area of 1800 sq ft. What is the lenght, width and perimeter of the roof?

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exam Other Question

write an equation of the line.Express it in standard form.
through (8,3)and(-4,3)
Solve y-3/x+2=-1/5 for y