Question

The volume of a cylinder is 289 cm2 and the height is 21 cm. Find the diameter. Round the answer to the nearest whole number.
A. 2 cm
B. 3 cm
C. 6 cm
D. 4 cm

Answer 1

ok what is the formula for cylinder

Answer 2

Idk this is all it showed me

Answer 3

\[v=\pi*r^{2}*h\]
can you take it from here?

Answer 4

something is wrong with this we website today

Answer 5

i dont know how to do it

Answer 6

\[289 = \pi*21*r^{2}\]
solve for r, can you?

Answer 7

you still not done with it?

how can you keep r on one side of the equation?

Answer 8

i just want the answer but it doesnt matter anymore i already got my assignment graded

Answer 9

\[289 = \pi * 21 *r^{2}\]
\[\frac{ 289 }{ \pi * 21 } = \frac{ \pi * 21 *r^{2} }{ \pi * 21 }\]
\[\frac{ 289 }{ \pi * 21 } = r^{2} \]
\[\sqrt{\frac{ 289 }{ \pi * 21 }} = \sqrt{ r^{2} }\]
\[\sqrt{4.38055} = r\]
\[2.093 = r\]


\[d=2*r\]
\[d=2*(2.093)\]
\[d=4.18 = 4cm\]

Answer 10

was it hard