Question 1062181
The largest area circle that fits in the 
square cross section is:
{{{ A = pi*(14/2)^2 }}}
{{{ A = 49*pi }}}
{{{ A = 153.938 }}} cm2
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The volume of the cylinder is:
{{{ V = A*30 }}}
{{{ V = 153.938*30 }}}
{{{ V = 4618.14 }}} cm3
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The volume of wood left over is:
{{{ 14^2*30 - 4618.14 }}}
{{{ 5880 - 4618.14 = 1261.86 }}} cm3
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check the math