Question

The radius of a circle wheel is 35 cm. How many revolutions does it make to cover a distance of 81.40

Answer 1

circumference=2πr
=2×22/7×35
=44×5=220cm
no. of revolution=81.40/220
=0.37

Answer 2

Given radius of circle = 35cm
Therefore, circumference of circle = 2πr
= 2*(22/7)*35
=2*22*5(as 35 and 7 get cut and result is 5)
=220cm

Now if distance given is 81.40cm
Then, number of revolutions = 81.4/220
= 0.37 revolutions.


If distance given is in metres,
Then, number of revolutions = 0.37*100 = 37 revolutions.

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