the area A of the cross section of the column is
.
<u>Step-by-step explanation:</u>
Here we have , building engineer analyzes a concrete column with a circular cross section. The circumference of the column is 18π, pi meters. We need to find What is the area A of the cross section of the column .Let's find out:
We know that , Circumference of circle = ![2\pi r](https://tex.z-dn.net/?f=2%5Cpi%20r)
⇒ ![Circumference = 2\pi r](https://tex.z-dn.net/?f=Circumference%20%3D%202%5Cpi%20r)
⇒ ![18\pi= 2\pi r](https://tex.z-dn.net/?f=18%5Cpi%3D%202%5Cpi%20r)
⇒ ![\frac{18\pi}{2\pi }= \frac{2\pi r}{2\pi }](https://tex.z-dn.net/?f=%5Cfrac%7B18%5Cpi%7D%7B2%5Cpi%20%7D%3D%20%5Cfrac%7B2%5Cpi%20r%7D%7B2%5Cpi%20%7D)
⇒ ![\frac{18\pi}{2\pi }=r](https://tex.z-dn.net/?f=%5Cfrac%7B18%5Cpi%7D%7B2%5Cpi%20%7D%3Dr)
⇒ ![r=9](https://tex.z-dn.net/?f=r%3D9)
We know that area of circle = ![\pi r^2](https://tex.z-dn.net/?f=%5Cpi%20r%5E2)
⇒ ![Area= \pi r^2](https://tex.z-dn.net/?f=Area%3D%20%5Cpi%20r%5E2)
⇒ ![Area= \pi 9^2](https://tex.z-dn.net/?f=Area%3D%20%5Cpi%209%5E2)
⇒ ![Area= 81\pi](https://tex.z-dn.net/?f=Area%3D%2081%5Cpi)
Therefore , the area A of the cross section of the column is
.
Answer:
75 miles
Step-by-step explanation:
Answer:
A. Parallel
Step-by-step explanation:
Answer:
Yes, it is divisible by three. The answer would be 280,249
Step-by-step explanation: