Hi!
Let's say you work 5 hours each day for 5 days.
There are 300 minutes in 5 hours.
- Monday: 300 - 20 = 280
- Tuesday: 280 - 20 = 260
- Wednesday: 260 - 20 = 240
- Thursday: 240 - 20 = 220
- Friday: 220 - 20 = 200
It saves you 100 minutes, which is 1 hour and 40 minutes.
Another way to solve this is 20 * 5 = 100.
The answer is: It will save you 1 hour and 40 minutes each week.
Hope this helps! :)
-Peredhel