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9 August, 06:07

The line A bus arrives at the bus stop every 20 minutes and the Line B bus every 15 minutes. both are at the bus stop right now. in how many minutes will be at the bus stop again?

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  1. 9 August, 06:44
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    We have to calculate the least common multiple of 20 and 15.

    20=2² * 5

    15=3 * 5

    LCM (15,20) = 2²*3*5=60

    Answer: 60 minutes.
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