Question
Two cars A and B travel from one city to another, at
speeds of 72 km/hr and 90 km/hr respectively. If car B takes 1 hour lesser than car A for the journey, then what is the distance (in km) between the two cities?Solution
Both travel same distance and so distance =speed*time time taken by B is t hours 72(t+1)=90t 72t+72=90t 18t=72 t=72/18 =4 hours Distance=90*4 =360 kilometers
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