P can do a work in the same time in which Q and R together can do it. If P and Q work together, the work can be completed in 10 days. R alone needs 30 days to complete the same work. then Q alone can do it in
Choose the correct choice from the following answers.
A) 10  B) 22  C) 25  D) 27  E) 30
Work done by P and Q in 1 day = 1/10   Work done by R in 1 day = 1/30   Work done by P, Q and R in 1 day = 1/10 + 1/30 = 4/30   But Work done by P in 1 day = Work done by Q and R in 1 day . Hence the above equation can be written as Work done by P in 1 day Ã— 2 = 4/30   =&gt; Work done by P in 1 day = 4/60   =&gt; Work done by Q and R in 1 day = 4/60   Hence work done by Q in 1 day = 4/60 â€“ 1/30 =2/60 = 1/30   So Q alone can do the work in 30 days   Answer is 30.
<result>E</result>
P can do a work in the same time in which Q and R together can do it. If P and Q work together, the work can be completed in 10 days. R alone needs 30 days to complete the same work. then Q alone can do it in