Workers

The first worker completed the work in 40 hours, the second in 50 hours, and the third in 80 hours. How long will it take them to do the work together?

Correct answer:

x =  17.3913 h

Step-by-step explanation:

a=40 h b=50 h c=80 h  h=a1+b1+c1=401+501+801=40010+4008+4005=40010+8+5=40023=0.0575  x h = 1  x=h1=400231=23400 h=17.3913 h



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