patelandrew816
25.01.2020 •
Mathematics
Rosita can wax her car in 2 hours or 120 minutes. when she works together with helga, they can wax the car in 45 minutes. how long would it take helga, working by herself, to wax the car?
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Ответ:
Step-by-step explanation:
Let w be the work of waxing.
Rosita can wax her car in 2 hours or 120 minutes.
Time taken by Rosita = 120 minutes
Let time taken by Helga be t,
When she works together with Helga, they can wax the car in 45 minutes.
We have
Time taken by Helga to wax the car is 72 minutes
Ответ:
10+15=25 (25 each week)
500/25=20
Hope this helps! Have a great day/night! :)