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IgorLugansk [536]
3 years ago
14

please give me the explanation for this question, been on it for like 3 hours and can't get the answer

Mathematics
2 answers:
BartSMP [9]3 years ago
8 0

Answer:

B

Step-by-step explanation:

What you have to do is to find the volume of both forms and add them together.

So the formula for area of a cone (the top half of the pylon) is:

V=πr^2(h/3)

So now we plug our values in.

V=π1^2(2/3)

Simplify.

V=2/3π

Next, we find the volume of the cylinder.

The formuhe formla for this is:

V=πr^2h

So again, we plug the values in

V=π1^2(3)

Simplify.

V=3π

Now we add the volume of the cylinder with the volume of the cone.

2/3π+3π=3 2/3π

Therefore, you need 2/3π cubic feet of concrete.

g100num [7]3 years ago
4 0

Answer: your answer is correct I don't understand why you can't get it

I got the exact same answer

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