Question 182582
The total surface area of a right circular cylinder is 294π square inches. If the altitude of the cylinder is twice the2.28 radius, find the altitude of the cylinder. 
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{{{A = 2*pi*r^2 + 2pi*r*h}}}
{{{294 = 2*pi*r^2 + 2pi*r*2r}}}
{{{294 = 2*pi*r^2 + 2pi*r*2r}}}
2pir*(r + 2r) = 147
{{{6pir^2 = 147}}}
{{{r^2 = 49/3pi}}}
r = ~ 2.28 inches
h = ~ 4.56 inches