A problem by shreya ahuja
Level
pending
Car A began a journey from a point at 9 am, travelling at 30 mph. At 10 am car B started travelling from the same point at 40 mph in the same direction as car A. At what time will car B pass car A?
The answer is 1.
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1 solution
The least common multiple for 30 and 40 is 120. Notice that car B start after car A reach 30 m.
Then, both of car A and car B need 3 hours to reach the same point at 120 m from start point.
Thus, car B will pass car A at 1 pm