# The time which took today my friend Rajat running with uniform speed to round once of a circular field of school is 30 seconds less while he ran diametrically with same speed. Let us write by calculating the area of field of school if his speed is 9 meter/sec.

Given, speed of Rajat = 9 m /sec Where distance is the perimeter of circular field

But perimeter = 2π r where r is the radius of circle

Time taken = According to the given condition Where r is radius of circular field and 2r = diameter 2π r 270 = 2r (taking LCM and cancelling 9 from both side)

2π r – 2r = 270

r (π -1) = 135  Area of the circular field = πr2 where r is the radius

= m2

= 12474 m2

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos  Surface Area of Right Circular Cylinder49 mins  Surface Area of Right Circular Cylinder52 mins  Surface Area and Volume of Right Circular Cone37 mins  Surface Area and Volume of Right Circular Cylinders42 mins  Champ Quiz | Area of Triangle53 mins  Champ Quiz | Area of Parallelogram55 mins  Let's Understand Circular Motion39 mins  Quiz | Area and Parallelogram46 mins  Quiz | Area of Parallelogram and Triangles43 mins  NCERT | Imp Qs on Area of Parallelogram And Triangles44 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation view all courses 