Question

A cylindrical well is 20 meters deep and has a diameter of 1.5 meters. Approximately how many cubic meters of soil were dug out to make the well? (Use π = 3.14.)

Answer 1

11.78 cubic meters
35.33 cubic meters
121.20 cubic meters
141.30 cubic meters

Answer 2

I believe what this question is asking for is the volume.

Answer 3

The formula for the volume of a cylinder is V = pi x radius^2 x height

Answer 4

it tells us to use 3.14 as pi, and gives us 20 as the height. do you know what the radius is? @Naruko885

Answer 5

I don't know any of this. They just gave me this and said if I got a good grade on it im out of the class for the rest of the year.

Answer 6

So the radius of an object is half the diameter. It tells us the diameter is 1.5, so what is 1.5 \(\div\) 2?

Answer 7

@Naruko885

Answer 8

0.75 ?

Answer 9

"what is 1/5 / 2"

Kind of what you say iGreen does, huh ?

Answer 10

Yes. So now we have V = 3.14 x 0.75^2 x 20.

First, we must do this in the correct order. We do the exponent first, so that is 0.75^2?

Answer 11

@Naruko885

Answer 12

and another one X'D

Answer 13

0.5625 ?

Answer 14

If you had a brain, you'd know I was talking about the final step. @Bob

Answer 15

:O dang

Answer 16

Good. Now we have V = 3.14 x 0.5625 x 20. Start from left to right and multiply. What is 3.14 x 0.5625?

Answer 17

https://www.youtube.com/watch?v=nauLgZISozs

Answer 18

I have like 30 minuets to get 8 question done. 1.76625

Answer 19

Loving the wizard of oz reference, but if it was meant as an insult... eh...

Answer 20

So our final step is 1.76625 x 20

Answer 21

so 35.325 .

Answer 22

So what is your answer?

Answer 23

B

Answer 24

yep

Answer 25

next

Answer 26

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