A can do a piece of work in 30 days. B in 50 days and C in 40 days. If A is assisted by B on one day and by C on the next day alternately, work will finish in
1
\(17 \frac{32}{35}\) Days
2
\(16 \frac{31}{37}\) Days
3
\(18 \frac{1}{3}\) Days
4
\(19 \frac{2}{3}\) Days