A is 40% more efficient than B, and B is 20% less efficient than C. If A can do a work in 50 days. In how many days all of them together can do the whole work?
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Let C = 100 then B = 80 and A = 140/100 of 80
So C = 25, B = 20, A = 28
Then Acc. to ques.
A can do in 50 days
So total work is 28*50 = 1400
And together they can do in 1400/73 = 19+13/73 days