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3 years ago

7

I will give brainliest to whoever can help!

2 answers:

son4ous [18]3 years ago

8 0

Answer:

1)open 2)false 3)5

Step-by-step explanation:

Marizza181 [45]3 years ago

5 0

Answer:

False

Open

5

Am I right??!

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A building engineer analyzes a concrete column with a circular cross section. The circumference of the column is 18π meters.

Whitepunk [10]

Answer:

$A=81\pi\ m^{2}$

Step-by-step explanation:

Step 1

Find the radius of the circular cross section

we know that

The circumference is equal to

$C=2\pi r$

we have

$C=18\pi\ m$

substitute and solve for r

$18\pi=2\pi r$

simplify

$18=2 r$

$r=9\ m$

Step 2

Find the area of the circular cross section

The area of the circle is equal to

$A=\pi r^{2}$

we have

$r=9\ m$

substitute

$A=\pi (9)^{2}$

$A=81\pi\ m^{2}$

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3 years ago

What is the TOTAL surface area?

BartSMP [9]

Answer:

SA=571.77

Step-by-step explanation:

SA==2πrh+2πr2=2·π·7·6+2·π·72≈571.76986

pls mark brainliest

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3 years ago

A square field has a side of 42 m. Find the cost of fencing its<br>boundary at Rs. 8 per metré.

Rufina [12.5K]

I have to say something bc I am sleepy

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2 years ago