## Smiley75 Group Title 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 3 years ago 3 years ago

1. Smiley75 Group Title

2. sstarica Group Title

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 ^_^

3. sstarica Group Title

give it a try :)

4. lokisan Group Title

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

5. sstarica Group Title

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

6. lokisan Group Title

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

7. sstarica Group Title

lol, np I do such mistakes too ^_^

8. Smiley75 Group Title

ok

9. sstarica Group Title

did you get the result?

10. Smiley75 Group Title

i guess..is it 3 centimeters?

11. sstarica Group Title

no

12. Smiley75 Group Title

i dont get it then

13. sstarica Group Title

$1131/40\pi = r^2$$r = \sqrt{1131/40\pi} = 9.42 = 9 cm$ substitute and solve for r ^_^

14. sstarica Group Title

do you get it now ? :)

15. Smiley75 Group Title

yup thanks

16. sstarica Group Title

np :)