Problema Solution
myra can weed a garden in 3 hours.ana can do it in 4 hours.how long will it take them to weed the gaden if they work together?
Answer provided by our tutors
myra can weed a garden in 3 hours, so each hour she does 1/3 of the job.
ana can do it in 4 hours, so each hour she can do 1/4 of the job.
If they work together, each hour they can do 1/3 + 1/4 of the job.
The time they need to finish the job is 1/(1/3+1/4) = 1/(7/12) = 12/7 = 1 5/7 hours
The answer is 1 5/7 hours