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harkovskaia [24]
3 years ago
15

How many revolutions must be made by a wheel of diameter 2.8m in order to cover a distance of 484km?

Mathematics
1 answer:
arlik [135]3 years ago
5 0
<h2>Answer :</h2>

A wheel is a circle.

Given diameter of wheel = 2.8 m

Then radius of the wheel = 2.8/2 = 1.4 m

Now we know that , circumference of circle =2\pi r

<h3>Then, </h3>

Circumference of wheel = 2 × 22/7 × 1.4

Circumference of wheel = 8.8 m

<u>From the above we can conclude that ;</u>

1 revolution = 8.8 m

x revolution = 484 km = 484000 m

<h3>Thus, </h3>

x =  \frac{1}{8.8}  \times 484000 \\  \\ x = 55000

<h3>Therefore, total of 55,000 revolutions are made by the wheel.</h3>
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