Q. 323.9( 9 Votes )

The wheels of a car make 2500 revolutions in covering a distance of 4.95 km. Find the diameter of a wheel.

Answer :

Let the diameter of the wheel be ‘d’ cm


Total distance covered in 250 revolutions = 49.5 km = 495000 m



Distance covered in one revolution = 198 cm eqn1


Also, Distance covered in one revolution = circumference of wheel


Distance covered in one revolution = πD where d = diameter of wheel



Equate equation 1 and 2 we get,




d = 9×7


d = 63 cm


The diameter of the wheel is 63 cm.


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