Question

A b c can do a piece of work in 30 20 10 days in how many days a do the work if he is assisted by b and c

Answer 1

Step-by-step explanation:

A can do work in 1 day =1/30

B can do work in 1 day =1/20

C can do work in 1 day =1/10

A + B + C can do work in 1 day= 1/30 +1/20 +1/10

[tex] \frac{2+ 3 + 6}{60} \\ \frac{11}{60}

So A B C together can do work in 60/11 days.