X does a work in 40 days. Y does the same work in 60 days. In how many days they together will do the same work?	Answers.
A) 10 B) 12 C) 24 D) 30 E) 15
X's 1day's work= 1/40   Y's 1 day's work=1/60   (X+Y)'s 1day's work= (1/40+1/60)=1/24   both together will finish the work in 24 days.   correct option is 24
<result>C</result>
X does a work in 40 days. Y does the same work in 60 days. In how many days they together will do the same work?