Elapsed time is 2 hours and 37 minutes and the end time is 1:15 what is the start time
1:15 - 2:37 = 13:15 - 2:37 = 12:75 - 2:37 = 12:38
well take 2 hours from 1:15
that would be 11:15
then take another 30 minutes off
that would be 10:45
then another 7 min off
10:38
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10:38 + 2:37 = 12: 75 = 1:15 sure enough
oobleck meant 10:38
12:75 - 2:37 = 10:38
yes, i did. thanks for the catch :-(
To find the start time, you need to subtract the elapsed time from the end time. Here's how you can do it:
1. Convert the elapsed time (2 hours and 37 minutes) into minutes. Since there are 60 minutes in an hour, multiply the number of hours by 60 and add the number of minutes. In this case, 2 hours * 60 minutes/hour + 37 minutes = 120 minutes + 37 minutes = 157 minutes.
2. Subtract the elapsed time (157 minutes) from the end time (1:15).
- If the end time is given in the 24-hour format, convert it to minutes by multiplying the hour value by 60 and adding the minute value. In this case, 1 hour * 60 minutes/hour + 15 minutes = 75 minutes.
- If the end time is given in the 12-hour format (AM/PM), convert it to the 24-hour format by adding 12 to the hour value if it's PM. Since the end time doesn't specify AM or PM, I'll assume it's PM. So, 1:15 PM converts to 13:15 in the 24-hour format, which is 13 hours * 60 minutes/hour + 15 minutes = 795 minutes.
3. Subtract the elapsed time (157 minutes) from the end time (75 minutes or 795 minutes). In this case, 795 minutes - 157 minutes = 638 minutes.
4. Convert the result back into hours and minutes. Divide the total minutes by 60 to find the number of hours and take the remainder as the number of minutes. In this case, 638 minutes รท 60 minutes/hour = 10 hours with 38 minutes remaining.
Therefore, the start time is 10 hours and 38 minutes before 1:15 PM (or 13:15 in the 24-hour format), which is approximately 2:37 AM.