A does a work in 10 days and B does the same work in 15 days. In how many days they together will do the same work ? Choices
A) 5 days B) 6 days C) 7 days D) 8 days E) 9 days
Explanation:   Firstly we will find 1 day work of both A and B, then by adding we can get collective days for them,   So,   A's 1 day work = 1/10   B's 1 day work = 1/15   (A+B)'s 1 day work =   (1/10+1/15)=(3+2/30)=1/6   So together they can complete work in 6 days.   Option 6 days
<result>B</result>
A does a work in 10 days and B does the same work in 15 days. In how many days they together will do the same work ?