Question

After how much time will both the buses arrive together next (in minutes), if they both arrived just now? ​

• A. 20
• B. 35
• C. 30
• D. 40

Answer 1

The correct option is D 40

Two buses arrive in every 5 minutes and 8 minutes

Here too, pick the keyword that is next.
This should be clear to all of you that we need to apply the concept of LCM.
Next time they will arrive will be at the LCM of 5 minutes and 8 minutes.


LCM of 5 min and 8 min is 40 min.
So after 40 minutes, both will arrive together next.