Ages, Pipes and Cisterns : Mathematics Objective Questions
1. The sum of the ages of father and son is 48 years. After 21 years, father?s age will be twice the age of his son. What is their present age?
a) 9,39
b) 8,28
c) 4,28
d) 7,29
2. A tap can fill a tank in 25 minutes and another can empty it in 50 minutes. If both are opened simultaneously when will the tank be filled.
a) 60 min.
b) 40 min.
c) 50 min
d) 25 min.
3. Two taps A and B can separately fill a cistern with water in 2 ? hrs.and 3 ? hrs. respectively and C can emptied the cistern in 2 hours. If the taps are opened for an hour alternately starting with A, B, and C in how many hours will the tank be filled.
a) 24hrs.
b) 18 hrs.
c) 16 hrs.
d) 20 hrs.
4. The sum of ages of A and B is now 110 years old and their age 20 years ago were in the ratio 4:3. What is the age of A?
a) 40 years
b) 65 years
c) 38 years
d) 60 years
5. A tank can be filled by a tap in 20 min and by another tap in 60 min. Both the taps are kept open for 10 min. and then the first tap is shut off. When will the tank be completely filled in.
a) 20min.
b) 40min
c) 24min
d) 36 min.
