Question
Pipe 'A' and pipe 'B', alone can fill a tank in 20
minutes and 30 minutes, respectively. Both the pipes were opened together to fill the tank, but later it was found that it took 3 minutes extra to fill the tank due to a leak. Find the time taken by the leak to empty the tank when it is completely full.Solution
Let total capacity of the tank be 60 units {LCM of 20, 30} Therefore, efficiency of pipe 'A' = (60/20) = 3 units/minutes Therefore, efficiency of pipe 'B' = (60/30) = 2 unit/minutes Sum of efficiency of both the pipes = 5 units/minutes Time taken by pipes 'A' and 'B' together to fill the tank = (60/5) = 12 minutes But due the leakage actual time taken by pipes 'A' and 'B' together to fill the tank = (12 + 3) = 15 minutes Therefore, effective efficiency of the pipes and the leak = (60/15) = 4 units/minutes Efficiency of the leak = (5 - 4) = 1 unit/minute Required time = (60/1) = 60 minutes
In the question below there are three statements followed by two conclusions I and II. You have to take the three given statements to be true even if t...
In the question below some statements are given followed by four conclusions I, II, III and IV. You have to take the given statements to be true even i...
Statements: Onion % Brinjals Brinjals # Tomato Cauliflower & Cucumber Tomato @ Cauliflower
Conclusion:
I. Cauliflower $ Brinjals
II...
Statements:
No Platform is a Train.
Only a few Trains are Hoardings.
Only a few Hoardings are Signals.
Conclusions:
...Statements :
Only a few Boat are Ship
Some Ship are River
All River are Fish
Conclusion :
I. Some Boat are Fish
Statement:
Each girl is boy.
Only a few girls are men.
Few girls are not women.
Conclusion:
1. All boys can be wome...
In the question below there are three statements followed by three conclusions I, II and III. You have to take the three given statements to be true ev...
Statements:Â
Only poles are wires
Only few poles are ornaments
All ornaments are copper
Conclusion:
I. All po...
In the question below there are three statements followed by two conclusions I and II. You have to take the three given statements to be true even if t...
Three statements are given followed by three conclusions numbered I, II, and III assuming the statements to be true, even if they seem to be at varian...
Relevant for Exams:
