Question
In a container containing 120 liters of pure petrol, 40
liters of petrol are drawn and replaced with the same quantity of diesel. This process is repeated twice more. Determine the approximate quantity of petrol remaining in the container.Solution
ATQ, Quantity of petrol left in the container = y{1 – (a/y)}n Where, y = original quantity of petrol, a = quantity of petrol replaced and n = number of times the process is repeated. Therefore, quantity of petrol left in the container = 120{1 – (40/120)}3 = 35.55 ~ 35.5 litres
Vikram alone can finish some work in 20 days. Vikram and Varun completed the work together and earned Rs. 8,000 as wage. If Varun's wage share is Rs. 3,...
John does ½ piece of work in 3 hours, Joe does ¼ of the remaining work in 1 hour and George finishes remaining work in 5 hours. How long w...
When working alone, Ansh takes 12 more days than time taken by Ansh and Balu together to finish certain work. If Ansh is 50% more efficient than Balu, t...
Pipe A alone can fill 75% of a cistern in 18 minutes. When both Pipe A and Pipe B are opened together, they can fill the entire cistern in 33 minutes. H...
A group of 8 men or 10 women can complete a certain task in 21 days. How many days will it take for a combination of 10 women and 4 men to complete the...
A alone can complete 50% of a work in 10 days while B takes 8 days more than A to complete it. If B and C together can complete the work in 12 days, the...
'K' and 'L' together can complete a work in 24 days. They started working together but after 16 days, 'L' left and remaining work was completed by 'K' a...
A and B together can do a piece of work in 9 days. A alone can do it in 15 days. In how many days can B alone do it?
Efficiency of a man is 25% more than that of a woman. (2n + 4) men working 8 hours a day can complete a task in 18 days, whereas (3n - 2) women working...
- 25 employees working 9 hours a day take 20 days to complete a project. How many employees working for 8 hours a day are needed to complete twice the given ...
