Question

Q.13 Three bells rings atinterval of 10, 12 and 15
minutes. They rang together at 12 Noon, when will they ring together?​

Answer 1

Answer:

at 3:00 pm

Step-by-step explanation:

LCM of 10,12,15 is 180

so they Will ring together after 180minutes ie. 3 hrs

they rang together at 12 noon

now again they will rang together ofter 3 hours that is at 3:00

Answer 2

Answer:

They will ring together after 1hrs

Step-by-step explanation:

10=2×5

12=2×2×3

15=5×3

LCM=2×2×3×5

=60

Therefore, they will meet together after 60 mins i.e 1hrs.