exam Maths Puzzle Numerical Ability

Julie stone designed a rectangular patio that is 25 ft by 40 ft. This patio is surrounded by a terraced strip of uniform width planted with small trees and shrubs. if the area A of this terraced strip is 504 ft^2, find the width of x of the strip.

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exam Other Question

Two planes left an airport at noon. One flew east at a certain speed and the other flew west at twice the speed. The plains were 2700 miles apart in 3 hours. How fast was each plane flying? 7-2n=n-14