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It takes Eric 20 minutes to inspect a car. John only needs 18 minutes to inspect a car. If they both start inspecting care at 8:00 am, what is the first time they will finish inspecting a car at the same time?

It takes Eric 20 minutes to inspect a car. John only needs 18 minutes to inspect a car. If they both start inspecting care at 8:00 am, what is the first time they will finish inspecting a car at the same time? Correct Answer 11 am

Least common multiple of 20 & 18 is 180. So, they will finish inspecting a car at the same time after 180 min = 180/60 hr = 3 hr. Now,  8 am + 3hr = 11 am

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