exam Maths Puzzle Numerical Ability

A conical shaped container is made from a circular piece of paper. It has a base radius of 9cm and a height of 12cm. What is the circumference of the original circle in centimatres?

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A man walks at the pace of 3 miles per hour. After 2 hours he stops for a rest. Let t be time after the rest when he continues to walk . Let d be the total distance traveled since he started. Write an equation linking d and t. Two airplanes leave an airport at the same time. The heading of the first is 120 degrees and the heading of the second is 320 degrees. If the airplanes travel at the rates of 700 mph and 600 mph respectively, how far apart are they after an hour?