Tom and Amy set the alarms on their phones to sound at 6:45 am. Both alarms sound together at 6:45 am. Toms alarm sound every 9

Question

Leona [35]

3 years ago

12

Tom and Amy set the alarms on their phones to sound at 6:45 am. Both alarms sound together at 6:45 am. Toms alarm sound every 9

minutes and Amy’s alarm sounds every 12 minutes. At what time will both alarms next sound together?

Mathematics

2 answers:

9966 [12] · Answer 1 · 2022-04-18T10:48:29+03:00

9966 [12]3 years ago

8 0

After 36 min , first alarm will ring 4 times (36=4*9) and the second alarm 3 times (36=3*12)
6.45- 6.54- 7.03- 7.12- 7.21
6.45- 6.57- 7.09- 7.21

At 7.21 will ring together

qaws [65] · Answer 2 · 2022-04-18T09:45:01+03:00

qaws [65]3 years ago

5 0

Answer is 7:21am,
12x3=36
9x4=36
Hence 6:45am adding 36 mins equals to 7:21am