Question

3. If A, B and C can do a piece of work, working together in 9 days. If B alone can do it in 21 days and C alone can to it in 18 days. In how many days can A complete the same work alone?​

Answer 1

3. If A, B and C can do a piece of work, working together in 9 days. If B alone can do it in 21 days and C alone can to it in 18 days. In how many days can A complete the same work alone?