Draw a side view. If the cylinder has radius r, and height h, then
r^2+h^2 = 6^2
the volume of the cylinder is thus
v = πr^2h = πr^2√(36-r^2)
now just find dv/dr=0 and thus the maximum volume's radius.
Find the dimensions of the largest right circular cylinder that can be inscribed in a sphere of radius 6 inches.
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