Question

9. Four bells toll at intervals of 8, 12, 16 and 20 seconds respectively. If they begin to toll at 12 noon,
when will they next toll together?​

Answer 1

Step-by-step explanation:

lCM of 8,12,16,20

8- 2*2*2

12- 2*2*3

16-2*2*2*2

20-2*2*5

lCM- 2*2*2*2*3*5- 240

so the bells toll after 240 seconds

that mean after 4 minutes

so the bells toll at 12.4 pm