The diameter of a wheel of a motor vehicle is 63 cm.find the number of complete rotations does during a journey of 2 km.
Lentgh of one rotation = Circumference of a circle = d * pi
63 cm = 0.63 m
Circumference = 0.63 * 3.14159 = 1.9792017 m
2 km = 2,000 m
2,000 / 1.9792017 = 1,010.50843
1,011 complete rotations