CAT 1994 — QA Question 15
Answer the next 2 questions based on the following information:
If
md(x) = x ,
mn(x,y) = minimum of x and y and
Ma(a,b,c,...) = maximum of a,b,c…
A water tank has three taps A, B, and C. A fills four buckets in 24 minutes, B fills 8 buckets in 1 hour and C fills 2 buckets in 20 minutes. If all the taps are opened together a full tank is emptied in 2 hours. If a bucket can hold 5 litres of water, what is the capacity of the tank?
Answer & solution
- A
120 litres
240 litres
- C
180 litres
- D
60 litres
Since a bucket holds 5 litres of water, water discharged in one minute by tap A, B and C is litres, litres and litres respectively.
If A, B and C are all opened simultaneously, total discharge in one minute = = 2 litres.
So in 2 hours, the discharge would be 240 litres, that is the capacity of the tank.