Respuesta :
Answer:
Alarm will go off at actual time of approximately 6:40 am
Step-by-step explanation:
If the clock is 4 minutes slower, it means that if an actual time passes by 1 hour and 4 minutes, the clock will show 1 hours.
We can use this relation to get define actual time and clock on time.
If we want to see how much the clock is late per minute, we can find that by:
4/40 = 0.067mins late per 1 minute
As clock is corrected at 8:00 pm. Caculate time on clock with respect to actual times.
Actual time: 9:04 pm , Time on clock = 9:00pm
Actual time: 10:08 pm , Time on clock = 10:00pm
Actual time: 11:12 pm , Time on clock = 11:00pm
Actual time: 12:16 am , Time on clock = 12:00am
Actual time: 1:20 am , Time on clock = 1:00am
Actual time: 2:24 am , Time on clock = 2:00am
Actual time: 3:28 am , Time on clock = 3:00am
Actual time: 4:32 am , Time on clock = 4:00am
Actual time: 5:36 am , Time on clock = 5:00am
Actual time: 6:40 am , Time on clock = 6:00am
For 6:00 am on the clock , actual time is 6:40 am
To calculate for 5:55 am, find how much late the clock be for 5 mins
(0.067)(5) = 0.335 min
Substract with from actual time 6:40 , and round off to nearest minute, we'll get the same answer
So alarm will go off at actual time of approximately 6:40 am
