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ICE Princess25 [194]
3 years ago
5

Thanks to whoever can help me!

Mathematics
2 answers:
rodikova [14]3 years ago
8 0

Answer:

B) 9 1/2   C) 1 1/2

Step-by-step explanation:

alexandr1967 [171]3 years ago
6 0
2 1/2 .need 20 characters to post
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if the height of the cylinder with a radius of 12 cm and a height of 20 cm has the same volume as a cone with a radius of 8 cm.
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Answer:

\large\boxed{H=135\ cm}

Step-by-step explanation:

The formula of a volume of a cylinder:

V=\pi r^2H

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We have the radius r = 12cm and the height H = 20cm. Substitute:

V=\pi(12^2)(20)=\pi(144)(20)=2880\pi\ cm^3

The formula of a volume of a cone:

V=\dfrac{1}{3}\pi r^2H

r - radius

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We have the radius r = 8cm and the volume V = 2880πcm³. Substitute:

\dfrac{1}{3}\pi(8^2)H=2880\pi\qquad\text{divide both sides by}\ \pi\\\\\dfrac{1}{3}(64)H=2880\qquad\text{multiply both sides by 3}\\\\64H=8640\qquad\text{divide both sides by 64}\\\\H=135\ cm

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Step-by-step explanation:

●Answer attached●

☆Hope it helps☆

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