Shobhita can complete a painting work in 20 hours while Saroj can complete the same work in 15 hours. In how much time (in hours) can the entire work of painting be completed, if both Shobhita and Saroj work simultaneously?
1
8
2
\(8 \frac{4}{7}\)
3
7
4
\(7 \frac{4}{7}\)