exam Maths Puzzle Numerical Ability

A patrol plane flies 220 miles per hour in still air. It carries fuel for 4 hours of safe flying. If it takes off on patrol against a wind of 20 miles per hour, how far can it fly and return safely?

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exam Other Question
if there is a plot of land that is 24 by 60. And surrounding the land is a walkway with an are of 247 ft sq. What is the length of the width of the walkway. What is -9 - the square root of 108 over 3 equal?