1/15 + 1/25 = 8/75
75/8 = 9 3/8 days
Anil can do a work in 15 days while Sunil can do it in 25 days. How long will they take if both work together?
1: 9 3/7 days
2: 9 7/8 days
3: 9 3/8 days
4: 4 3/8 days
5: 9 6/8 days