3 years ago

Jade and Ali set the alarms on their phones to sound at 7.15 am.

Mathematics

1 answer:

Kitty [74]3 years ago

5 0

Answer:

9:15 am

Step-by-step explanation:

Alarms sound at 7:15 am

Alarm frequencies are 40 min and 60 min

Since 40= 20*2 and 60= 20*3, the overlapping frequency is:

20*2*3= 120 min = 2 hours

So next time both alarms sound at 7:15 am + 2 hours = 9:15 am

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