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That's the question ?? ​

That's the question ?? ​-example-1
User Lhahn
by
8.6k points

1 Answer

3 votes

Explanation:

Before we answer, the area of a Circle given it radius is


a = \pi r {}^(2)

The area of a circle given it diameter is


a = \pi( (d)/(2) ) {}^(2)

So let answers question 1-4.

1. The area is


1024\pi

2. The area is


576\pi

3.


1.225\pi

4.


309.76\pi

For the 5th problem, circumference is


\pi * d

where d is the diameter and


2\pi r

where r is the radius.

A circumference of 100 m means the radius is 50 because


2\pi * r = 100\pi


r = 50

So this means the area is


2500 {\pi}

User Yan Pak
by
8.1k points

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