Question

the efficeincy of a,b and c are 4:5:6,working together the can complete a work in 12 days . in how many day A alone can complete the work

Answer 1

let a work is 4x ,b is 5x ,c is 6x

4x +5x+6x =12

15x=12

X=0.8

a work = 3.2

hope it helps