exam Maths Puzzle Numerical Ability

a poster is 25 cm taller than it is wide. it is mounted on a piece of cardboard so that there is a 5 cm border on all sides. if the area of the border alone is 1350 cm^2, what are the dimensions of the poster?

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exam Other Question
x= (1000) * [ (A-W) / (W) ] ### y= (1000) * [ (W-N) / (N)] ### z= (1000) * [ (A-N) / (N) ] Write z in terms of x and y. Is this even possible? what is the solution to 5w^5/7=160?