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1. It takse Russel 20 munites to inspect a car and Sohel needs 18 minutes to inspect a car. They both start inspecting cars separately at 8.00 am. At certain points of time both of them will finish inspecting a car at the same time. When will this occur for the first time?
- A. 10.00 am
- B. 10.00 am
- C. 10.00 am
- D. 10.00 am
Answer: Option B
Explanation:
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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