Question 390343
Let The circumference = {{{C}}}
Let the radius = {{{r}}}
{{{C = 2*pi*r}}}
{{{C = 25*pi}}}
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given:
{{{200/5}}}  rotations/min 
{{{(200/5) *( 60/1)}}} rotations/min x min/hr
{{{2400}}} rotations/hr 
{{{2400}}} rotations/hr x {{{25*pi}}} in/rotations = {{{188495.56}}} in/hr
{{{188495.56}}} in/hr x {{{.5}}} hr = {{{94247.78}}} in in 1/2 hr
{{{94247.78/12}}} in x ft/in = {{{7853.98}}} ft