Ravi can do a piece of work in 24 days while Prakash can do it in 40 days. In how many days will they finish it together?
Pick.
A) 15  B) 16  C) 17  D) 18  E) 10
1/24 + 1/40 = 1/15   15 days   15nswer: 15
<result>A</result>
Ravi can do a piece of work in 24 days while Prakash can do it in 40 days. In how many days will they finish it together?