Question

In a school,the duration of a period in junior section is 40minute and in senior section is 1hour .if the first bell for each section rings at 9:00a.m.when will the two bells ring together again
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Answer 1

Answer:

what we need to find here is the L.C.M of 40 minutes and 60 minutes.

The L.C.M of 40 minutes and 60 minutes  is 120 minutes which means the bell will ring together after 120 mins or 2 hours.

9:00 a.m. + 2 hrs = 11 a.m.

Hope this helps you !

Answer 2

Answer:

the bell rings together after 2hours

Step-by-step explanation:

first we have to convert 1 hour into mins which is 60 amd then we'll take LCM of both timing (40mins and 60mins)amd the LCM will be 120mins no we convert it into hours and then we'll get our ans which is 2hours