In a school, there are two bells, one in the primary school
and the other in the secondary school. Both the bells ring
after every class. The primary school has classes 45
minutes each whereas the secondary school has classes
every 1 hour. Find when both the bells ring at the same
time again if both classes start at the same time?
Answers
Answer:
In a school, the duration of a class in the primary school is 40 minutes and it’s 1 hour in the secondary section. If both sections begin school at 10 AM, when will the two bells ring together again?
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4 Answers

Arindam Ganguly, Business Analyst/Strategist/Development at Real Time Data Services Private Limited - Gurgaon (2019-present)
Answered September 16, 2018
All the answers provided before this post takes into assumption that there is no gap between two consecutive classes or how the break time is placed. Maybe there is a break after second class for each, that will shift the time by that duration. Also it is not clear from the question if there is any gap between two consecutive classes or not, as many school provides 5 minutes of gap between two consecutive classes an a small break after first two classes.
So without any detailed information, this question cannot be appropriately solved!
Answer:
Just Take out the LCM to get the answer
Step-by-step explanation: