A can do a work in 60days and B in 12 days.Then A and B together do the work in,how many days?  Choose the correct choice from the following answers.
A) 5 days  B) 4 days  C) 10 days  D) 2 days  E) 6 days
Explanation:   A's 1day's work = 1/60   B's 1day's work = 1/12   They work together = 1/60 + 1/12 = 10 days   Answer: Option 10 days
<result>C</result>
A can do a work in 60days and B in 12 days.Then A and B together do the work in,how many days?