Challenger App

No.1 PSC Learning App

1M+ Downloads
If two pipes can fill a tank in 20 minutes & 30 minutes respectively. If both the pipes are opened simultaneously, then the tank will be filled in

A10 minutes

B15 minutes

C12 minutes

D18 minutes

Answer:

C. 12 minutes

Read Explanation:

xy/(x+y) = (20 x 30)/(20 + 30) =600/50 =12 minutes.


Related Questions:

12 ആളുകൾ 25 ദിവസംകൊണ്ട് ചെയ്തുതീർക്കുന്ന ജോലി 15 ദിവസംകൊണ്ട് തീർക്കാൻ ഇനി എത്ര ആളുകൾ കൂടി വേണം?
A 10 ദിവസംകൊണ്ടും B 15 ദിവസംകൊണ്ടും ഒരു ജോലി ചെയ്യും. എങ്കിൽ രണ്ടുപേരും ഒരുമിച്ച് എത് ദിവസംകൊണ്ട് ജോലിചെയ്യും?
10 men can finish a piece of work in 10 days, whereas it takes 12 women to finish it in 10 days. If 8 men and 6 women undertake to complete the work, then in how many days will they complete it?
Tap A can fill a tank in 6 hours and tap B can empty the same tank in 10 hours. If both taps are opened together, then how much time (in hours) will be taken to fill the tank?
There are three pipes in a tank. If pipe A is opened, the tank will be filled in 10 minutes. If pipe B is opened the tank will be filled in 12 minutes. If pipe C is opened, the tank will be emptied in 15 minutes. And through the leakage at the bottom, the tank will be emptied in 20 minutes. If all three pipes are opened together without closing the leakage, in how many minutes will the tank be filled?