Question

14. A and B can do a piece of work in 72 days. B
and C can do it in 120 days. A and C can do it
in 90 days. In what time can A alone do it?
(a) 80 days
(b) 100 days
(c) 120 days (d 150 days
(e) None of these
(SSC 2011]​

Answer 1

Answer:

I think (a) 80 days can do work