Question
If Ankit takes four times the time that Ravi takes or five
times the time that Sandeep takes to finish a task, and all three working together can complete it in four days, how much time will Ravi need to complete the task alone?Solution
ATQ;
Let time taken by Ankit alone to finish the work = 20x
Time taken by Ravi alone to finish the work = 5x
Time taken by Sandeep alone to finish the work = 4x
Let total work = LCM of 20x, 5x, and 4x = 20x
Part of work done by Ankit, Ravi, and Sandeep alone in 1 day is 1 unit, 4 units, and 5 units respectively.
Total time taken to finish the task by all the 3 persons together = 4
20x / (1 + 4 + 5) = 4
x = 2
Time taken by Ravi alone to finish the work = 5x = 10 days
What was the sum of the ages of the father and the daughter 5 years earlier?
A. Ratio of the father’s present age to the ...
What is the speed of a boat in still water?
I. The boat covers a distance of 120km in 5 hours while running upstream.
II. It covers the sa...
The question consists of two statements numbered "I and II" given below it. You have to decide whether the data provided in the statements are suicient ...
How many students passed in first class?
I. 75% of the students who appeared in the examination have passed in first or second or third class....
What is the speed of the stream?
I. The boat covers a distance of 54 km in 3 hours while running downstream.
II. The boat covers the same ...
Ramu gained how much by selling his product in June 2017?
I. He earned 40% more profit in July 2017 as compared to May 2017.
II. In June 2...
There are 7 people in a group. Average age of the group decreases by 5 when two more people join the group. Find the average age of the new group.
<...What is the marked price of the furniture?
Statement I: A storekeeper marks his furniture 20% above the cost price and he allows 8(1/3)% discoun...
A real estate investor owns three properties: X, Y, and Z. What is the total profit earned from these properties after selling them?
Statements:...
What is the speed of the boat in still water?
Statement I. The boat travels at the speed of 12 km/h upstream.
Statement II. The boat tra...