book Maths Puzzle Numerical Ability

My question is : A passenger train leaves the train depot 2 hours after a freight train leaves the same depot. The freight train is traveling 20 mph slower than the passenger tra

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At the site of the old millstone, a triangle. Two sides: 15 and 10 yards; 30 degree angle opposite the 10-yard side: corner located at the center of the millstone. Third side: due What is the perimeter of a right angle triangle whose area is 600 ft. squared?