The test Keyshawn's class took finished at 10:30 A.M. The first part of the test took 30 minutes. There was a 15 minute break. The second part of the test also took 30 minutes. At what time did the test start?
9:15a.m.
30 + 30 + 15 = 75 minutes = 1 1/4 hours
10:30 - 1:15 = ?
To find out what time the test started, we need to subtract the total duration of the test from the finishing time.
Given information:
Finishing time: 10:30 A.M.
First part duration: 30 minutes
Break duration: 15 minutes
Second part duration: 30 minutes
To calculate the test start time:
1. Subtract the total duration of the test from the finishing time: 10:30 AM - (30 minutes + 15 minutes + 30 minutes)
2. Convert the finishing time to a 24-hour format: 10:30 AM = 10:30
3. Subtract the total duration of the test (75 minutes) from the finishing time: 10:30 - 75 minutes
Let's perform the calculation:
10:30 - 75 minutes = 9:55
Therefore, the test started at 9:55 AM.
To find out what time the test started, we need to subtract the total time of the test (including the break) from the finishing time.
The first part of the test took 30 minutes, and the second part also took 30 minutes. So, the total test time is 30 + 30 = 60 minutes.
There was also a 15 minute break during the test. Therefore, we need to add the break time to the total test time.
Break time: 15 minutes
Total test time: 60 minutes
So, the overall time spent during the test, including the break, is 60 + 15 = 75 minutes.
Now, we'll subtract the total test time from the finishing time.
Finishing time: 10:30 A.M.
Overall test time: 75 minutes
To find the starting time, we subtract 75 minutes from 10:30 A.M.
10:30 A.M. - 75 minutes = 9:55 A.M.
Therefore, the test started at 9:55 A.M.