SSC GD MATHS QUIZ

Two pipes $A$ and $B$ can fill a cistern in 3 hours and 5 hours respectively. Pipe $C$ can empty in 2 hours. If all the three pipes are open, in how many hours the cistern will be full?

A swimming pool has 3 drain pipes. The first two pipes $A$ and $B$ operating simultaneously can empty the pool in half the time then that C the 3 rd pipe alone takes to empty it. Pipe $A$ working alone takes half the time taken by pipe $B$. Together they all take 6 hours 40 minutes to empty the pool. Time taken by pipe A to empty the pool in hours is:

A pipe can fill a cistern in 12 minutes and another pipe can fill it in 15 minutes, but a third pipe can empty it in 6 minutes. The first two pipes are kept open for 5 minutes in the beginning and then the third pipe is also opened. Number of minutes taken to empty the cistern is:

Pipe A alone can fill a tank in 8 hours. Pipe B alone can fill it in 6 hours. If both the pipes are opened and after 2 hours Pipe A is closed, then the other pipe will fill the tank in ?

A cistern has 3 pipes $A, B$ and $C . A$ and $B$ can fill it in $3 \mathrm{hr}$ and $4 \mathrm{hr}$ respectively and $\mathrm{C}$ can empty it in 1 hour. If the pipes are opened at 3 pm, 4 pm and 5 pm respectively on the same day, the cistern will be empty at

A tank can be filled by pipe $A$ in 2 hours and pipe $\mathrm{B}$ in 6 hours. At 10 a.m pipe A was opened. At what time will the tank be filled if pipe B is opened at 11 a.m?

If $\frac{3 }{ 7}^{\text {th }}$ of a cistern is filled in 36 minute, then what is the time (in minutes) needed to fill the remaining part?

Two pipes $\mathrm{P}$ and $\mathrm{Q}$ can fill the tank alone in 200 and 600 hours respectively. If they are opened together, then in how many hours will the tank be filled ?

There are two inlet pipes $\mathrm{A}$ and $\mathrm{B}$ can fill a tank in 20 minutes and 30 minutes respectively. Outlet pipe C can empty the whole tank in 15 minutes. What time will they take (in minutes) to fill the whole tank, if they start together?

Pipe A can completely fill an empty tank in 11 hours. Pipe B can empty the same completely filled tank in 15 hours. If they are opened together, in how much time the empty tank will get filled?