Question

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

Answer 1

Answer:

first we have to find circumference of the wheel

2*22/7*2.8

= 17.6m

1km = 1000m

484*1000=484000

484000/17.6

=27500 revolutions

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Answer 2

Answer:

55000 revolutions

Step-by-step explanation:

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 =2πr

Then,

Circumference of wheel = 2 × 22/7 × 1.4

Circumference of wheel = 8.8 m

From the above we can conclude that ;

1 revolution = 8.8 m

x revolution = 484 km = 484000 m

Thus,

x= 1/8.8×484000

x=55000

Therefore, total of 55,000 revolutions are made by the wheel.

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