Question 873342
James travels 550km by car and returns the same distance by train. The car travels 25km/h faster than the train and takes 75 minutes less time. What is the speed of the car in the nearest km/h?
<pre>
Quadratic equation: {{{S^2 - 25S - 11000 = 0}}}
Speed of car:  118.1231509 &#8776; {{{highlight_green(118)}}} km/h
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