book Maths Puzzle Numerical Ability

The length of time it takes Brad to get to work varies inversely with his speed of travel. If it takes him 2.5 hours when traveling 15 miles per hour, how long does it take when traveling 50 miles per hour?

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book Other Question

A guy wire (a type of support used for example, on radio antennas) is attached to the top of a 50 foot pole and stretched to a point that is d feet from the bottom of the pole. Express the angle of inclination as a function of d. rewrite -6(r+12) without parenthesis using the distributive