Question

A giant wheel in a fair had a diameter of 42m. What is the distance a person travels in one complete revolution?
$say \: ans \: fast$
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Answer 1

The Concept

In this question, we need to know the circumference of a circle. Circumference of a circle refers to the boundary or the perimeter of the circle. To calculate it, the following formula is used:

$\boxed{\bf{2\pi r\:\:or\:\:\pi d}}$

wherein,

• r = radius
• d = diameter
• π = 22/7

Answer

We are given that the diameter of the giant wheel is 42 m. To calculate the distance a person travels in one revolution, we will calculate the circumference of the circle.

Applying the formula:

$\sf{\Rightarrow \pi d}$

$\sf{\Rightarrow \dfrac{22}{7}\times42}$

• Cancelling 42 from 7,

$\sf{\Rightarrow 22\times6}$

$\boxed{\bf{\Rightarrow 132\:m}}$

Therefore, a person travels 132 m in one complete revolution.

Answer 2

Answer:

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