exam Maths Puzzle Numerical Ability

a certain aircraft can fly 912 miles with the wind in 3 hours and travel the same distance against the wind in 8 hours. what is the speed of the wind.

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exam Other Question

the length of a rectangle is twice its width. if the perimeter is 60, find the dimensions of the rectangle. Solve these proportions.

(3) 9/x = 2/3
(6) 16/m=1/4
(9) y/4=5/8
(12) 2/7 = 5/y
(15) 18/c = 2/7
(18) 63/144 = u/16
(21) 7/b = 4/9
(24) y/18 = 150/126