A builder appoints three construction workers A, B and C on one of his sites. They take 8, 10 and 15 days respectively to do a piece of work. How many days will it take by A to complete the entire work if he works alone on the first day and is assisted by both B and C every alternate day?
1
6 / 11
2
11 / 24
3
24 / 11
4
36 / 7
5
5 / 11