Question

P and Q can do a piece of work in 20 days Q andR in 12 days and R and p in 15 days if they all work together in how many days will they finish ​

Answer 1

Answer:

A work can be completed by P and Q in 12 days, Q and R in 15 days, R and P in 20 days. In how many days P alone can complete the work ? ∴ P alone will complete the work in 30 days. Hence option [C] is correct answer.