Herman and Rosie need to wash the walls on the side of the school. Herman has a power washer, which could complete the job in 10

Question

2 years ago

6

Herman and Rosie need to wash the walls on the side of the school. Herman has a power washer, which could complete the job in 10

hours. Rosie has a manual scrubber, which could complete the job in 15 hours. If they work together, how many hours will it take them to clean the wall?

Mathematics

1 answer:

lutik1710 [3] · Answer 1 · 2022-09-15T13:18:34+03:00

lutik1710 [3]2 years ago

7 0

It would take them 6 hours. Six hours is 3/5 of Herman’s required time. 6 hours is 2/3 of Rosie’s, so 3/5 +2/5= the project being complete.