Answer:
9:20 A.M.
Step-by-step explanation:
Let's list out the points at which the 25-minute bell rings:
25 mins, 50 mins, 1 hour 15 mins, 1 hour 40 mins, 2 hours 5 mins, 2 hours 30 mins, 2 hours 55 mins, 3 hours 20 mins
Next let's list out the points at which the 40-minute bell rings:
40 mins, 1 hour 20 mins, 2 hours, 2 hours 40 mins, 3 hours 20 mins
From the lists above we see a common multiple of 3 hours and 20 minutes.
So, to find what time they ring after 6 A.M. add 3 hours and 20 minutes to it.
6 AM + 3 hours and 20 minutes = 9:20 A.M.
Thus, both bells would ring together again at 9:20 A.M.
Hope this helps!!
