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El Salvador recently announced that it is planning to build the world’s first “Bitcoin City”. It will be initially funded by bitcoin-backed bonds. The city will not levy any taxes except for value-added tax (VAT).
Tap A and Tap B fill a drum of volume 494 liters in 19 minutes. If their efficiencies are in the ratio x:y respectively and B alone takes to fill the ci...
If a tank can be filled by a tap in 10 hours, but due to an outlet, it actually takes 5 hours longer to fill the tank, find the duration in which the o...
Pipe ‘A’ can fill a tank in 12 hours while pipe ‘B’ takes 15 hours to empty it. Pipe ‘A’ is opened alone when the tank was empty and after 1...
Two pipes P1 and P2 can fill a cistern in 12 minutes and 15 minutes respectively. These pipes are opened alternately for 1 minute each, beginning with p...
Pipe ‘A’ takes 40 minutes to fill a tank. Pipe ‘B’ takes 50 minutes to empty the same tank. If pipe ‘B’ is opened 21...
Two inlet pipes M and N alone can fill a tank in 10 hours and 12 hours respectively and an outlet pipe P alone can empty the whole tank in 5 hours. Firs...
Pipe ‘A’ can fill a tank in 50 hours whereas leak ‘A’ can empty it in 60 hours. If they both operate along with pipe ‘B’, then the given tan...
Two pipes A and B can fill a tank in 12 hours and 15 hours, respectively. Another pipe C can empty the tank in 10 hours. If all three pipes are opened t...
An inlet tap alone can fill a tank in 40 minutes. However, when both an inlet and an outlet tap are open together, the tank takes 66 (2/3) minutes (or 2...
Three pipes are connected to a cistern such that pipes A and B can fill the cistern in 12 minutes and 18 minutes respectively, and pipe C can empty the ...