alexiskaimilanimichi
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*PLEASE HELP ASAP*

Naomi paints a section of a fence in 9 hours, and Ramona paints the same amount of fence in 12 hours. How long does it take them to paint the fence if they work together? Round to the nearest tenth.

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Answer:

5.1 hours

Step-by-step explanation:

Given that :

Naomi:

Time taken = 9hours

Rate = 1/9

Ramona :

Time taken = 12 hours

Rate = 1/12

Working together :

Time. Taken = 1 / (sum of their rates)

Time taken = 1 / (1/9 + 1/12)

L. C. M of 9 and 12 = 36

Sum up f their rates :

(4 + 3) / 36 = 7/36

Time taken = 1 / (7/36)

= 36 / 7

= 5.142 = 5.1 hours

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