book Maths Puzzle Numerical Ability

Marcella leaves home at 9:00 A.M. and drives to school, arriving at 9:45 A.M. Ifthe distance between home and school 27 mi, what is Marcella"s average rate of speed?

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measure of an angle of elevation of the top of a pole is 15degree from a point on the ground.In walking 100m towards the pole the measure of an angle is found to be 30degree.Find t I am having trouble simplifying. I know it sounds silly but I have never seen this one or dont remember it. I thought that expanding the problem and elimination would be the answe