Question

Three city tour buses leave the bus stop at 9:00 a.m. Bus A returns every 30 minutes, Bus B returns every 20 minutes and Bus C returns every 15 minutes. What is the next time, the buses will all return at the same time to the bus stop? A) 9:30 a.m. B) 10:00 a.m. C) 11:00 a.m. D) 11:30 a.m.

Answer 1

Answer:

b10:am

Step-by-step explanation:

take the lcm of the time then add it to the time

Answer 2

12:00 PM

Step-by-step explanation:

We have given that

All the three buses leave at = 9:00 AM

First bus complete its journey in = 30 mins

Second bus complete its journey in = 20 mins

Third bus complete its journey in = 45 mins

We will take LCM of all the buses : => 30, 20, 45

It will be => 180

So here 180 is the number of minutes that these three buses will take to complete their journey simultaneously .

180/60= 3Hrs

Then = 9+3=12

The answer is 12 PM.

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