Q1
Three pipes A, B and C can fill a tank from empty to full in 30 minutes, 20 minutes, and 10 minutes respectively. When the tank is empty, all the three pipes are opened. A, B and C discharge chemical solutions P, Q and R respectively. What is the proportion of the solution R in the liquid in the tank after 3 minutes?
A.
B.
Answer
C.
D.
Answer: Option B
Solution
Answer: Option B
Solution:
Part filled by (A + B + C) in 3 minutes