Question

The radius of the wheel is 1.05 m. How many revolutions will it make in travelling 66 km
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Answer 1

Answer:

Step-by-step explanation:

Given:

The radius of the wheel of a car is 2.1 m.

Distance = 6.6 km

To find out:

How many revolution will it make in travelling 6.6 km?

Solution:

Radius = 2.1 m

Circumference of circle = 2πr

= 2 × 22/7 × 2.1

= 44/7 × 21/10

= 44 × 3/10

= 132/10

= 13.2 m

Now,

✪Distance covered = 6.6 km = 6.6 × 1000 = 6600

Therefore,

Number of revolutions = Distance/Radius

= 6600/13.2

= 6600 × 10 / 132

= 66000/132

= 500

Hence, 500 revolution will it make in travelling 6.6 km.