Two cars travel from city a to city b at a speed of 30 and 36 km/hr respectively. If one car takes 3 hours lesser time than the other car for the journey, then the distance between city a and city b is
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Suppose the distance be d km.the then let the time taken by the second car be=d/108 hrs and by the first car=d/60hrs. then we have,
d/60-d/108=2hrs=>d(1/60-1/108)=2
=>d(9-5/540)=2.
=>d(1/135)=2
=>d=270km.
hence the distance between the two cities is 270km
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