Answered

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Joshua and Logan are not very handy.
Joshua can replace the brakes of his car in 2 hours while it takes Logan 5 hours to change his breaks on the same model car. How long would it take them to change the brakes if they worked together?
It would take them
hours to change the brakes?

Sagot :

Answer:

1 3/7 hours    exact answer

1.43 hours    decimal approximation

Step-by-step explanation:

1 brake/2hrs + 1brake/5hrs = x

to find how much they can do in the same amount of time

use common denominator of 10 hours

5brakes/10hrs + 2brakes/10 hrs = 7brakes/10 hrs

10 hrs for 7brakes = 10/7 hours for 1 brakes

1 3/7 hours to do the brakes working together

or as a decimal  about 1.4285714286 hours

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