The distance between London and York is 320 km. A train takes x hours to travel between
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Question:
The distance between London and York is 320 km. A train takes x hours to travel between London and York.
(a) Write down an expression, in terms of x, for the average speed of the train in km/h.
Answer ........................................ km/h
(b) A car takes 2.5 hours longer than a train to travel between London and York. The average speed of the train is 80 km/h greater than the average speed of the car. Form an equation in x and show that it simplifies to 2x2 + 5x – 20 = 0
Related Book For
Cambridge IGCSE And O Level Additional Mathematics Coursebook
ISBN: 9781108411660
2nd Edition
Authors: Sue Pemberton
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