Question
Pipes X and Y can independently fill a tank in 80
minutes and 90 minutes respectively, while pipes X and Z together take 3 hours to fill the same tank. If pipes X and Y are turned on for the first 36 minutes, after which pipe X is turned off and pipe Z is turned on, how long will it take in total to fill the tank?Solution
ATQ, Let total capacity of the tank = 720 litres Quantity of water filled by pipe X in one minute = 720/80 = 9 litres Quantity of water filled by pipe Y in one minute = 720/90 = 8 litres Quantity of water filled by pipes X and Z together in one minute = 720/180 = 4 litres Quantity of water emptied by pipe Z in one minute = 9 – 4 = 5 litres Quantity of water filled by pipes X and Y together in 36 minutes = 36 × 17 = 612 litres Time taken to fill the remaining tank = (720 – 612)/(8 – 5) = 36 minutes Desired time = 36 + 36 = 72 minutes
A spent 20% of his monthly income on study and 65% of the remaining on rent. If amount spent on rent is Rs. 1047.8, then find the amount spent on study
The salary of A is 40% more than B, and the bonus of C is 150 more than the difference of the salaries of A and B. If C receives a bonus of 270, find A'...
By selling 36 m of jute, a shopkeeper gains an amount equal to the selling price of 12 m of jute. Find the gain percentage.
The maximum marks in an examination was 500. Shiva got 25% more than Parul, Parul got 10% more than Tashu. If Shiva got 275 marks. What percentage of fu...
Ganesh gives 30% of her salary to his wife, 12% of the remaining amount to his children and 10% of the remaining to his parents. If has given a total am...
In an election, two candidates A and B participated.
Z spends 65% of his salary and saves the remaining. After his salary is increased by 30%, he saves 45% of the increased amount besides the amount he use...
A scored 246 marks in an examination and B got 50 percent marks in the same examination which is 48 marks less than A. If the minimum passing marks in t...
- During a college election, two students were in the fray. The one who received 75% of the valid votes won by a difference of 2250 votes. Determine the numb...
Income of 'A' is Rs. 2,000 more than that of 'B'. Both spend 30% of their respective incomes. If the savings of 'C' is 20% of his income and is equal to...
 Mains/Quant...</a></li> <li><a href="https://www.ixambee.com/questions/quantitative-aptitude/percentage/109628" class=)
Relevant for Exams:
