Three painters

The three painters have painted bridge. The first would work done in 5 days, the second in 6 days, and the third in 7.5 days. How long will the bridge work if they work together?

Correct answer:

x =  2 d

Step-by-step explanation:

d1=15+16+17.5=12=0.5  x=1d1=10.5=2 d



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Showing 2 comments:
#
Nestor
Why the third fraction 1/7.5 when it is supposed to be 1/7?

#
Dr Math
Yes, there was bug, but now is corrected. Thank you

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