book Maths Puzzle Numerical Ability

y^2 � 5y + 25/4

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Mr X spent 2.5 hrs biking up a mountain. Rested for 30 minutes. Biked down in 1.5 hrs. How far did Mr. X bike, if his rate of ascent was 3 km/hr less than his rate of decent? A rectangular garden has dimension of 55 yds by 40 yds if a diagonal path that is exactly 1 yard wide is built through the garden. What is the ares of the path?