Question

An electronic device makes a beep after every 15 minutes .another device makes a beep after every 20 minutes they beeped together at 6 am .at what time will they next beep together

Answer 1

Answer:

At 7'o clock the alarm beep together.

Step-by-step explanation:

Given : An electronic device makes a beep after every 15 minutes .another device makes a beep after every 20 minutes they beeped together at 6 am.

To find : At what time will they next beep together?

Solution :

An electronic device makes a beep after every 15 minutes .

Another device makes a beep after every 20 minutes.

So, we have to find the least common multiple of 15 and 20

i.e, LCM(15,20)=60

Which means after 60 minute the alarm beep

or 6 am + 1 hour = 7 am

At 7'o clock the alarm beep together.

Answer 2

Answer:

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Step-by-step explanation:

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