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A foreign key in a database links two tables by referencing the primary key of another table, ensuring relational integrity.
Two inlet pipes 'A' and 'B' can fill an empty tank in 60 minutes and 120 minutes, respectively. Another outlet pipe 'C' can empty the tank in 240 minute...
Two pipes A and B can fill a tank in 24 min., and 32 min, respectively. If both the pipes are opened simultaneously, after how much time B should be clo...
A tank is normally illed in 8 hours but takes another 2 hours longer to ill because of a leak in its bottom. If the tank is full, the leak will empty it...
Tap A can fill tank X in 20 minutes, but with a leakage (tank Y), it takes 33(1/3) minutes to fill. Tap B operates at 20% less efficiency than Tap A. De...
Pipe ‘A’ can fill a tank in 30 hours whereas leak ‘A’ can empty it in 50 hours. If they both operate along with pipe ‘B’, then the given tan...
Pipe ‘A’ and pipe ‘B’ can fill a cistern in 20 minutes and 12 minutes respectively. Pipe ‘C’ alone can empty the cistern in 10 minutes. If a...
An inlet can fill an empty tank in 7 hours whereas an outlet pipe can empty it in 14 hours. If (N - 1) such outlet pipes having same efficiency and (N +...
There are three taps with diameters of 3cm, 4cm, and 5cm respectively. The ratio of the water flowing through them is equal to the ratio of the square o...
Tap ‘A’ and tap ‘B’ can fill a tank in 40 hours and 36 hours, respectively. If both taps are opened together, then find the time after which tap...
Pipe A and B can fill the pool in 15 minutes and 20 minutes, respectively. Pipe C can empty half filled pool in 6 minutes. If all the pipes are opened t...
