A tank can be filled by two pipes in 20 minutes and 30 minutes respectively. When the tank was empty, the two pipes were opened. After some time, the first pipe was stopped and the tank was filled in 18 minutes. After how much time of the start was the first pipe stopped
A tank can be filled by two pipes in 20 minutes and 30 minutes respectively. When the tank was empty, the two pipes were opened. After some time, the first pipe was stopped and the tank was filled in 18 minutes. After how much time of the start was the first pipe stopped
1). 5 minutes
2). 8 minutes
3). 10 minutes
4). 12 minutes
SSC CGL Books
1 answers
Other Questions
1. Three pipes P, Q and R can separately fill a cistern in 4,8 and 12 hours respectively. Another pipe S can empty the completely filled cistern in 10 hours. Which of the following arrangements will fill the empty cistern in less time than others
2. Three pipes P, Q and R can separately fill a cistern in 4,8 and 12 hours respectively. Another pipe S can empty the completely filled cistern in 10 hours. Which of the following arrangements will fill the empty cistern in less time than others
3. A swimming pool has 3 drain pipes. The first two pipes A and B, operating simultaneously, can empty the pool in half the time that C, the 3rd pipe, alone takes to empty it. Pipe A, working alone, takes half the time taken by pipe B. Together they take 6 hours 40 minutes to empty the pool. Time taken by pipe A to empty the pool. (in hours) is
4. Three pipes A. B and C can fill a tank in 6 hours. After working together for 2 hours, C is closed and A and B can fill the remaining part in 7 hours. The number of hours taken by C alone to fill the tank is
5. A cistern can be filled with water by a pipe in 5 hours and it can be emptied by a second pipe in 4 hours. If both the pipes are opened when the cistern is full, the time in which it will be emptied is :
6. Which of these pipes will empty a pool the fastest (i) One pipe of diameter 60 cm (ii) Two pipes of diameter 30 cm each (iii) three pipes of diameter 20 cm each
7. $\frac{3}{4}$ part of a tank is full of water. When 30 litres of water is taken out, the tank becomes empty.The capacity of the tank is
8. If $\frac{1}{3}$ of a tank holds 80 litres 0f water, then the quantity of water that $\frac{1}{2}$ tank holds is :
9. Three taps A. B. C can fill an overhead tank in 4, 6 and 12 hours respectively. How long would the three taps take to fill the tank If all of them are opened together
10. A tank can be filled by two pipes in 20 minutes and 30 minutes respectively. When the tank was empty, the two pipes were opened. After some time, the first pipe was stopped and the tank was filled in 18 minutes. After how much time of the start was the first pipe stopped
