12. The distance between Singapore and Kuala Lumpur is 315 km. The average speeds of a car and an aeroplane from Singapore to Kuala Lumpur are 60 km/h and 900 km/h respectively. Find, for a trip from Singapore to Kuala Lumpur, (a) the time taken by the car and the aeroplane, (b) the ratio of the time taken by the car to that by the aeroplane.
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