A, B and C can do a piece of work in 20 days, 30 days and 60 days, respectively, working alone. How soon can the work be done if A is assisted by B and C each on every alternate day?
1
\(\frac{40}{3}\) days
2
\(\frac{28}{3}\) days
3
\(\frac{37}{4}\) days
4
\(\frac{53}{4}\) days