X does a work in 10 days. Y does the same work in 15 days. In how many days they together will do the same work?
Choose the correct choice from the following choices:
A) 10
B) 15
C) 3
D) 6
E) 12
X's 1day's work= 1/10   Y's 1 day's work=1/15   (X+Y)'s 1day's work= (1/10+1/15)=1/6   both together will finish the work in 6 days.   correct option is 6
<result>D</result>
X does a work in 10 days. Y does the same work in 15 days. In how many days they together will do the same work?