Comprehension Passage
Direction: Go through the graph and table given below and answer the question based on it.
“A cistern is connected with eight pipes where P, Q, R and S are inlet pipes and W, X, Y and Z is outlet pipes. The graph given below depicts the time taken by the pipes individually to fill or empty the tank.”
Note: The time is given in minutes
Find the ratio of time taken by P, Q and Z to fill the cistern to time taken by R, S and W to fill the cistern?
1
20 ∶ 9
2
9 ∶ 20
3
2 ∶ 9
4
9 ∶ 2
5
None of these