Number problem. One task took 7 minutes (min), a second task took 12 min, and
a third task took 21 min. How long did the three tasks take, as a fraction of an
hour?
2007-04-27 09:50:44 · 5 answers · asked by karen 2 in Science & Mathematics ➔ Mathematics
40/60, simplified to 2/3 of an hour.
just add all of the minutes, put the number over 60 (minutes in an hour) and simplify.
2007-04-27 09:54:59 · answer #1 · answered by giwishihadadollar 2 · 0⤊ 0⤋
Since there are 60 minutes in an hour
fraction of an hour = 7/60+12/60+21/60
fraction = 40/60 =2/3 of an hour.
2007-04-27 16:56:43 · answer #2 · answered by Robert L 7 · 0⤊ 0⤋
Total time = 7 + 12 + 21 = 40 min.
40/60 = 2/3 of an hour.
2007-04-27 16:54:57 · answer #3 · answered by Scott H 3 · 1⤊ 0⤋
1 hour=60 minutes, so
7/60+12/60+21/60=40/60=2/3
The three tasks took 2/3 of an hour.
2007-04-27 16:55:52 · answer #4 · answered by anonymousperson 4 · 0⤊ 0⤋
You want to add up the total number of minutes and then show them as divided by the number of minutes in 1 hour. Then simplify the answer.
I am happy to help but do not give the answer as I believe it is more important for you to figure it out. But again am happy to help with instructions. That way you learn to do this rather than just copy down the popular answer provided.
2007-04-27 17:00:37 · answer #5 · answered by John 6 · 0⤊ 0⤋