Question 892914
First find the volume in cubic inches.
{{{V=L*W*D}}}
{{{V=81*15*20}}}{{{in^3}}}
{{{V=24300}}}{{{in^3}}}
One cubic yard equals {{{(36*36*36)}}}{{{in^3}}} or {{{46656}}}{{{in^3}}}
So then,
{{{V=24300/46656}}}{{{yd^3}}}
{{{V=0.521}}}{{{yd^3}}}