Question

Three bells toll at intervals of 8 minutes, 15 minutes, and 24 minutes respectively. If they tell together at 3pm at what time will they next toll together?

Answer 1

Answer:

5 pm

Step-by-step explanation:

First we need to find the L.C.M. of 8,15 and 24.

8 | 8,15,24

3 |1,15,3

1,5,1

so, LCM = 8x3x1x5x1 = 120

The bell will ring together after every 120 min

= (120/60) hours

= 2 hours

so the next time the bell rings = 3 + 2 = 5 pm. (ans)