In a shop, there are three clocks which chime at intervals of $15, 20$ and $30$ minutes respectively. If they all chime together at $10$ a.m., at what time will they all chime together again in morning?

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Solution

LCM of 15,20,30=60
so that clocks will chime together after every 60 minutes.
Therefore, after 10 am they will chime together at 11 am

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In a shop, there are three clocks which chime at intervals of 15,20 and 30 minutes respectively. If they all chime together at 10 a.m., at what time will they all chime together again in morning?

LCM of 15,20,30=60so that clocks will chime together after every 60 minutes.Therefore, after 10 am they will chime together at 11 am

In a shop, there are three clocks which chime at intervals of $15, 20$ and $30$ minutes respectively. If they all chime together at $10$ a.m., at what time will they all chime together again in morning?

LCM of 15,20,30=60
so that clocks will chime together after every 60 minutes.
Therefore, after 10 am they will chime together at 11 am