puriststrainofhate puriststrainofhate

24-05-2016
Mathematics

Answered

A sphere with a diameter of 16mm has the same surface area as the total surface area of a right cylinder with the base diameter equal to the sphere diameter. How high is the cylinder?

A16 mm
B8 mm
C18 mm
D14 mm

Verified Answer :

whiskeyo whiskeyo

24-05-2016

\(R_{sphere}= \frac{1}{2} *16=8[mm]\\ A_{sphere}=4 \pi R^{2}\\ A_{cylinder}=2 \pi R(R+h)\\\\ 4\pi R^{2}=2 \pi R(r+h)\\ \frac{4\pi R^{2}}{2 \pi R} =r+h\\ h= \frac{4\pi R^{2}}{2 \pi R}-R=2R-R=R\\ R=8[mm]\)

So the answer is B. 8 mm

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audreymoulton03 audreymoulton03

25-03-2020

Answer:

8 mm

Step-by-step explanation:

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