Question

A, B and C together can do a work in 20 days. If A and C can do the same

work in 40 and 60 days respectively, then in how many days can B complete

it?​

Answer 1

A+c= 1/40+1/60

=5/120=1/24

B=A+B+C-A+C

B=1/20-1/24

B=1/120

B= 120 days