‘A’ can do a work in 20 days while ‘B’ can do it in 30 days. ‘A’ and ‘B’ working together can do it in---

‘A’ can do a work in 20 days while ‘B’ can do it in 30 days. ‘A’ and ‘B’ working together can do it in---

A 10 days

B 12 days

C 15 days

D 18 days

Solution

Correct Answer: Option B