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
The cost of diamond varies directly as the square of its weight. A diamond broke into four pieces with weights in the ratio 1: 4: 5: 6. if the loss in t...
What is the angle traced by the hour hand in 18 minutes?
In the given figure, ABCD is a square of side 14 cm. E and F are mid points of sides AB and DC respectively. EPF is a semicircle whose diameter is EF. L...
Find the area of triangle having sides 3m, 4m, and 5m.
In the given figure, Ab = 30 cm and CD = 24 cm. What is the value (in cm) of MN?
One chord of a circle is given as 21.5 cm. Then the radius (r) of the circle must be:
10 identical solid spherical balls of radius 3 cm are melted to form a single sphere. In this process 20% of solid is wasted. What is the radius (in cm...
What will be circumradius of a right angle triangle whose base is 7 cm & height is 24 cm ?
The lengths of three medians in a triangles are 30 cm, 40 cm, 50 cm. What is the area of that traingle (in cm 2 )?
The area of an equilateral triangle is 16√3 sq m. Its perimeter isÂ
Relevant for Exams:
