Ram and Sita can do a work in 30 days whereas Ram alone can do it in 10 days.How many days will it take for Sita to do the work alone?
Hi Pooja!This is Neeraj Atluri.Simple way to answer these questions are
Ram and Sita work together and complete work in 30 days=>daily work done by them is 1/30;
Ram alone work=10 days=>per day work is 1/10;
Ram +Sita=1/30
1/10+Sita=1/30
Sita=1/30-1/10;
Sita= -1/15;
As you got the answer in negetive,Your question is not so appropriate because "the task completion days induvidual should be" >"Task completion days when they work as group".But according to your question it is vice versa.So your question is not so appropriate.