Question 791313
The volume of a cylinder is 980 (pi) in^3.
 The height of the cylinder is 20 in.
 What is the radius of the cylinder?
:
The equation
{{{pi*r^2*20}}} = {{{980*pi}}}
divide both sides by pi, resulting in:
{{{r^2*20}}} = {{{980}}}
divide both sides by 20
{{{r^2}}} = {{{980/20}}}
{{{r^2}}} = {{{49}}}
r = {{{sqrt(49)}}}
r = 7 in is the radius
:
:
You can check this in the original equation
{{{pi*7^2*20}}} = {{{980*pi}}}