Question
Pipe ‘A’ and pipe ‘B’ can fill a cistern in 20
minutes and 15 minutes respectively. Pipe ‘C’ alone can empty the cistern in 10 minutes. If all three pipes are opened together then what is the time taken to fill 25% of the cistern? ty-sscSolution
Let the capacity of the cistern = 60 units Then, efficiency of pipe ‘A’ = 60/20 = 3 units/minute Efficiency of pipe ‘B’ = 60/15 = 4 units/minute Efficiency of pipe ‘C’ = 60/10 = 6 units/minute So, combined efficiency of pipes ‘A’, ‘B’ and ‘C’ = 3 + 4 – 6 = 1 units/minute 25% of the cistern’s capacity = 15 units Therefore, time taken by all 3 pipes together to fill 25% of the cistern = 15/1 = 15 minutes
A batsman scored 120 runs which included 3 boundaries and 8 sixes. What percent of his total score did he make by running between the wickets. <...
A bag contains 550 coins of 25p denomination and 1100 coins of 50p denominations. If 11% of 25p coins and 22% of 50p coins are removed, the percentage o...
- If value of 'Q' is 15% of 'P', then 'Q' is how much percentage of the remaining part of 'P'?
The sum of the monthly incomes of ‘A’, ‘B’ and ‘C’ is Rs. 65000 which is 4 times the monthly income of ‘C’. If ‘A’ spends 55% of his...
In a company interview test, 65% of the students passed in the first round, and 55% passed in the technical round, while 15% of students failed in both ...
Sunita scored 434 marks in a test and failed by 6 marks. If the passing marks of the test is 25%. What is the maximum mark of the test?
In 2020, Sumit's expenditure and savings are in the ratio of 4:3 . The following year, his expenditure increases by 25% , and his savings grow by (100/3...
If 20% of a = b and then b is:
- The population of a town increased by 10% in the first year, then again by 15% in the second year, and decreased by 20% in the third year. If the populatio...
Sachin allocates 40% of his monthly income to his studies. From what remains, he spends 35% on food. After these expenses,he saves Rs. 1560 each month. ...
Relevant for Exams:
