Question

Todra investigates the measures of a cylinder in math class. she knows that the volume of the cylinder is 1131.0 cubic centimeters. todra determines that the length of the cylinder is 40 centimeters. What is the radius of the cylinder?
a. 1 centimeter
b. 2 centimeters
c. 3 centimeters
d. 4 centimeters

Answer 1

alright, you have the given which is the following:

- V = 1131.0 cm^3
- L = H = 40 cm


and we know that the general formula of the volume of the cylinder is :

\[V= \pi r^2 h\]
you have V and you have H, substitute and find R

^_^

Answer 2

give it a try :)

Answer 3

The volume of a cylinder is \[V=\frac{1}{3}(area_.base)(height)\]

Answer 4

are you sure? because that's the volume of a cone loki

Answer 5

ah...yes...kibosh the third. doing this too long...

Answer 6

lol, np I do such mistakes too ^_^

Answer 7

ok

Answer 8

did you get the result?

Answer 9

i guess..is it 3 centimeters?

Answer 10

no

Answer 11

i dont get it then

Answer 12

\[1131/40\pi = r^2\]\[r = \sqrt{1131/40\pi} = 9.42 = 9 cm \]

substitute and solve for r ^_^

Answer 13

do you get it now ? :)

Answer 14

yup thanks

Answer 15

np :)