Question
Time taken by pipe 'A' to fill a tank is 50 minutes.
When both pipes 'A' and 'B' are opened together, the tank gets filled in 25 minutes. Find the time taken by 'B' to fill the tank alone.Solution
Let the capacity of the tank be 150 litres (LCM of 50 and 25).
Efficiency of 'A' = (150/50) = 3 litres/minute
Combined efficiency of 'A' and 'B' = (150/25) = 6 litres/minute
Efficiency of 'B' = 6 - 3 = 3 litres/minute
Therefore, required time = (150/3) = 50 minutes
Hence, the answer is 50 minutes.
Statements:Â Â Â Â Â Â
Some pens are stands.
All stands are pencils.
Conclusions:Â Â Â Â Â Â
I. Some pens are pen...
Statements:
No cabin is a room.
All rooms are houses.
No house is a flat.
Some flats are apartments.
Concl...
Statements:
No watches are mobile.
Some mobile is earphone.
Only a few earphones is bike.
Only a few bike is car.
...
Statements : Some eggs are chickens.
No chicken is a hen.
No hen is a pigeon.
Conclusions : I. Some eggs may be hens.
II....
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at varianc...
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at varianc...
Statements:Â
Only a few Balloon are String.
All Balloon are Colour.
Only a few Strings are Scales.
All Scales are Toffee.
Statement: Â
All N are M Â
Only M is D. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
Conclusion:
I. Some N are ...
Statements:
At least some blue are red.
Some black are pink.
Every red is black.
None pink is green.
Conclusions:
...Statements : Some rows are lines
All lines are parallels.
All parallels are numbers.
Conclusions : I. All rows being lines is a p...
