exam Maths Puzzle Numerical Ability

Two trains are traveling toward each other and are 950 miles apart. One plane is flying at 170 mph .The other is flying at 210 mph. In how many hours will the planes pass each other?

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questions----- Evaluate 2x-3y when x=-5 and y=-4 ? A search plane has a cruising speed of 250 miles per hour and carries enough fuel for at most 5 hours of flying. If there is a wind that averages 30 miles per hour and the directio