book Maths Puzzle Numerical Ability

A rectangle is 3 times as long as it is wide. If it's length and width are both decreased by 2cm, it's area is decreased by 36cm2. Find it's origional dimentions. Draw a picture of

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It takes a passenger train 2 hours less time than it takes a freight train to make a trip from Central City to Clear Creek. The passenger train averages 96 km/h while the freight train averages 64 km/h. How far is it from Central City to Clear Creek? Jim is 21 years older than Bill. Twelve years ago, Jim was twice as old as Bill. Find their present ages.