Question

In a school the duration of a class in the primary section is 40 minutes and in the secondary section it is 1hour.if both section begin in school at 10 a.m..when will the two bell rings together again

Answer 1

Answer:

after two hour at 12 pm

Step-by-step explanation:

1hr have 60 min so 2hr will be 120 min and 120 comes in 40 table 40×3=120 which is 2hr so at 12pm

Answer 2

Answer:

at 12 pm

Step-by-step explanation:

becoz if 1 section is of 40 then it will be 40X3 so it means after 120 mins...

and 2 section is of 60 mins then it will be 60 X2 so it means after 120 mins...