Question

A and B together can do a piece of work in 12 days; B and C together can do it in 15 days. If A is twice as good workman as C, in How many days A alone will do the same work? ​

Answer 1

Answer:

let total work 60

efficiency of A and B 5

B and C is 4

ratio of A and C is 2:1

then arange efficiency of all like A=2 B=3C=1

A complete d in 60/2 =30days