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Nostrana [21]
3 years ago
12

Roland and Sam wash dogs to make extra money. Roland can wash all of the dogs in 4 hours. Sam can wash all of the dogs in 3 hour

s. How long will it take them to wash the dogs if they work together?
Mathematics
2 answers:
Sholpan [36]3 years ago
6 0

Answer:

1h 5/7

Step-by-step explanation:

I just got 100% on this quiz.

GRADPOINT

dimaraw [331]3 years ago
4 0
To complete the 100% of (the job) washing, Roland needed 4 Hours & Sam, 3 hour,
Mind you 100% = 1
Find for each one the (job) achieved in 1 hour:

Roland achieved 1/4   & Sam 1/3 each one in 1 hour.

In one hours both will achieve 1/4+1/3 =7/12

So they will complete 7/12 (of the job) in 1 hour & for a time = t they will complete 100% (or 1) of the job, that is 1/t =7/12 & t=12/7 =1.71 hour
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