exam Maths Puzzle Numerical Ability

Well, im just having a problem getting the General idea.
Do i combine the Measure of Angle A and B in the problem to = 90?
or do i use one to find the other?
Thanks in Advance

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exam Other Question

A plane flies 500 miles with the wind and 340 miles against the wind in the same length of time. If the speed of the wind is 28mph, what is the speed of the plane in still air? Express your answer in the standard form. Find the equation of a line:

A)-Passing through (2,5) and parallel to the X-axis.

B)- Passing through (-3, 4) and parallel