SOLUTION: After lunch, a supervisor asks you to put a machine together before the end of the day. It Is already 4 hours, 20 minutes and 35 seconds into your 8-hour work day. How much time do

Algebra ->  Rate-of-work-word-problems -> SOLUTION: After lunch, a supervisor asks you to put a machine together before the end of the day. It Is already 4 hours, 20 minutes and 35 seconds into your 8-hour work day. How much time do      Log On


   

Question 1104693: After lunch, a supervisor asks you to put a machine together before the end of the day. It Is already 4 hours, 20 minutes and 35 seconds into your 8-hour work day. How much time do you have to assem
ble the machine?
Found 2 solutions by josgarithmetic, josmiceli:
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
8 hours minus 4 hours 20 minutes 35 seconds

Borrowing will be necessary for the subtraction of the minutes and the seconds.

60 minutes per hour;
60 seconds per minute;

7+60/60 gives you the 8 hours as hours and minutes;

7+59/60+60/60 gives you the 8 hours as hours minutes seconds

7%2Ahour%2B59%2Aminutes%2B60%2Aseconds-%284%2Ahour%2B20%2Aminutes%2B35%2Aseconds%29
3%2Ahour%2B%2859-20%29minutes%2B%2860-35%29%2Aseconds
4%2Ahours%2B39%2Aminutes%2B25%2Aseconds

4 hours 39 minutes 25 seconds

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
8 hrs = 7 hrs and 60 min
8 hrs = 7 hrs and 59 min and 60 sec
minus
-------4 hrs and 20 min and 35 sec
-----------------------------------
-------3 hrs and 39 min and 25 sec
Is the time left to assemble machine
--------------------------------------