The volume of a cylinder is #794# #cm^3#. The height of the cylinder is #7# #cm#. How do you calculate the radius of the cylinder to the nearest tenth of a centimeter?

1 Answer
[eden] · Dan Kemp
Jun 7, 2017

Firstly, what we need to do is to define the formula to find the volume of a cylinder:

#V = pi * r^2 * h#

Then, from using this formula, we can then find the radius...

#V = pi * r^2 * h = 794#

= #V = pi * r^2 * 7 = 794#

= #pi * r^2 = 794/7#

= #r^2 = 113.4285714 / pi#

= #r = sqrt 36.10543566#

= #r ~~ 6#

#therefore# the radius of the cylinder #approx 6#

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