RRB Junior Engineer / DMS / CMA 2019 · Question 1992 of 3719

Three pipes P, Q and R can fill a tank in 30 minutes, 20 minutes and 10 minutes. When the tank is empty, all three pipes are opened while they discharge three chemical solutions S, T and U respectively. What is the proportion of solution U in the contents in the tank after 3 minutes?

1. A$$\frac{6}{11}$$Correct
2. B$$\frac{4}{11}$$
3. C$$\frac{5}{11}$$
4. D$$\frac{7}{11}$$