Math CentralQuandaries & Queries


Question from Anil, a student:

3 cars are moving at speed of 4 kmph,5.5 kmph and 8 kmph in a circular track.The circular track has
a distance of 11 km. What is the time taken for all the 3 cars to meet at the starting point ?

How to solve this..? please help me..?

Hi Anil.

To go one full lap (11 km), car A takes 11/4 hours, car B take 11/5.5 hours and car C takes 11/8 hours.
Therefore the question is really asking for the lowest common integer multiple of these three fractions!

Write back if you need more hints.
Stephen La Rocque

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