Question

A,B and ,c can do a piece of work in 10days a alone can do it in 40days and B alone can do it in 30days .in how many days will C alone do the same work​

Answer 1

24 is the answer....

efficiencies are

a+b+c = 12

a= 3

b=4

so c= 5

total work = 120

so time of c = 120/5= 24 days