Question

naina can do a piece of work in 12 days rekha can do the same work in 15 days and naina rekha and shalu together can complete the work in 5 days. In how many days will shalu alone finish the work ?
Please give me stape by stape explain the answer ​

Answer 1

Answer:

naina can do a piece of work in 12 days rekha can do the same work in 15 days and naina rekha and shalu together can complete the work in 5 days ...