Question

1
Three Pipes P, q and R Together can Fill
Cistern in 11 hours, if Pipe P q and R
opened together but after 6 hours q
is closed and p and R fills the remaining
Cistern in
8 more hours then the Find in
how much time Pipe q can fill the cistern
alone ?​

Answer 1

Step-by-step explanation:

Three pipes P, Q, and R are attached to a tank. P and Q individually can fill the tank in 3 hours and 4 hours respectively, while R can empty the tank in 5 hours. P is opened at 10 am and Q is opened at 11 am, while R is kept open throughout. If the tank was initially empty, approximately at what earliest time it will be full if P or Q cannot be opened together and each of them needs to be kept closed for at least 15 minutes after they have been opened for 1 hour?

A. 4:30pm

B. 6:00 pm

C. 6:30 pm

D. 8:30pm

E. 9:30pm