Question

In a school, the duration of a class in primary section is 40 minutes and in the secondary section is 50 minutes. If both the sections begin at 8. am., when will bells of the two sections ring together again? *

Answer 1

Answer:

after 5 session

Step-by-step explanation:

frist will be 40 and 50 min

next will be same

time between in 5 session is

40into5 min =200 min

Answer 2

Answer:

11:30 am

Step-by-step explanation:

for this first we find LCM of 40 and 50

which is 200

so after 200 minutes bell will ring together

i.e. 3hours 20 min later

i.e. at 11:30 am