Question
Pipe ‘A’ can fill a tank in 16 hours whereas leak
‘A’ can empty it in 20 hours. If they both operate along with pipe ‘B’, then the given tank gets filled in 8 hours. How much time is needed to fill the given tank if pipe ‘B’ and leak ‘A’ work together?Solution
Let the capacity of the tank be 80 litres {LCM (16 and 20)} Efficiency of pipe ‘A’ = 80 ÷ 16 = 5 litres/hour Efficiency of leak ‘A’ = 80 ÷ 20 = 4 litres/hour Combined efficiency of pipe ‘A’ and leak ‘A’ = 5 – 4 = 1 litre/hour Combined efficiency of pipe ‘A’, ‘B’ and leak ‘A’ = 80 ÷ 8 = 10 units/hour Efficiency of pipe ‘B’ = 10 – 1 = 9 units/hour Time taken by pipe ‘B’ and leak ‘A’ to fill the tank = 80 ÷ (9 – 4) = 16 hours
In which year was the profit as percentage of income is the highest?
If 30% of the TV sold by shopkeeper S and 25% of the refrigerator sold by shopkeeper S are defective, then find the total number of non-defective items ...
What is the approximate average number of vehicles (in thousand) sold by all the companies in the year 2013?
Number of people living in apartment C is by how much percent more than the number of people living in apartment B.
Number of chocolates purchased by Amit from shop B is what percent more or less than total number of chocolates purchased from shop D?
What is the ratio of students who applied for Graduation in 2013, 2015 and 2016 together to the students who applied for Post Graduation in 2012, 2013 a...
The table given below shows the record of the number of students who got selected in the entrance exam of M. Phil. in a particular central university fr...
What is the average number of Bikes manufactured by companies Hero, Bajaj and TVS?
If numbers of students who apply for Graduation in 2011 are 100/3% less than students who apply for Graduation in 2012 then, number of students who appl...