Richa can do a piece of work in half the time in which Kailash does that work. Sanjay can do the same work in one third of the time taken by Richa. All three do the work for 30 days after which Kailash left. Sanjay and Richa completes the remaining work in 18 days. How many days will it take for Richa alone to complete the total work?

Richa can do a piece of work in half the time in which Kailash does th

1.	Richa can do a piece of work in half the time in which Kailash does that work. Sanjay can do the same work in one third of the time taken by Richa. All three do the work for 30 days after which Kailash left. Sanjay and Richa completes the remaining work in 18 days. How many days will it take for Richa alone to complete the total work?
A.	138
B.	69
C.	414
D.	207
Answer» E.