exam Maths Puzzle Numerical Ability

A 4.0 Litre can of paint covers 24 metres squared of surface area. A can of primer covers 18 metres squared of surface area. The second coat of paint only requires 75% as much pain

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A rectangle is 5cm. longeer than it is wide.If its length and width are both increased by 3 cm. its area is increased by 60 cm squared.Find the dimensions of the original rectangle. State the circle and radius of the circle given by (x-2)^2+(y+3)^2=20