In takes Russel 20 minutes to inspect a car and Sohel needs 18 minutes to inspect a car. They both start inspecting cars separately at 8.00 A.M. At certain points of time, both of them will finish inspecting a car at the same time. When will this occur for the time?

A 9.30 A.M.
B 9.42 A.M.
C 10.00 A.M.
D 11.00 A.M.

Correct Answer: 11.00 A.M.

The least common multiple of 20 and 18 is 180. So, they will finish inspecting cars 180 minutes after starting. Now, 180 minutes = 3 hours So, 8 am + 3 hours = 11 am.
Bissoy MCQ
#গণিত #Dhaka Bank Ltd #Dhaka Bank Ltd - MTO - 2004

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