Question
Economics is the study of the administration of scarce
resources and the determinants of employment and income.” Definition of Economics was given by:Solution
Lord Keynes defined economics as ‘the study of the administration of scarce means and the determinants of employment and income”.
Pipe ‘A’ takes 30 hours to fill a tank. Pipe ‘B’ takes 90 hours to empty the same tank. If they are opened together, then 60% of the tank will b...
Pipe A can fill a tank in 10 hours, whereas pipe B can empty the same tank in 12 hours. If the two pipes are operated alternately for one hour each, sta...
An inlet pipe can fill an empty tank in 30 minutes whereas an outlet pipe can empty the fully filled tank in 45 minutes. Find the time taken by both the...
Pipes X and Y can independently fill a tank in 80 minutes and 90 minutes respectively, while pipes X and Z together take 3 hours to fill the same tank. ...
Two pipes A and B can fill a tank in 24 minutes and 30 minutes respectively, while a third pipe C can empty it in 40 minutes. If all three pipes are ope...
Pipe ‘A’ can fill a tank in 20 hours while pipe ‘B’ takes 40 hours to empty it. Pipe ‘A’ is opened alone when the tank was empty and after 1...
Pipe A alone fill the tank in x hours and Pipe B alone fill the tank in (x – 5) hours. If the efficiency of pipe B is double of pipe A and pipe A fill...
There was the leakage in the Oil tanker. If 20 litre of oil is leaked out per day then it would have lasted for 50 days and if the leakage was 32 litre ...
Pipes ‘A’ and ‘B’ can fill a tank in 6 hours and 4 hours respectively. When both pipes and an outlet pipe ‘C’ are opened together, (2/5)th o...
An inlet pipe can fill a tank in 8 hours, whereas an outlet pipe can empty the same tank in 16 hours. Find the time taken by three such inlet pipes and ...
