Question 731861
Compare the volumes
{{{ 3*3*3 = 27 }}} m3
{{{ 6*6*6 = 216 }}} m3
Now set up a ratio:
{{{ 1/ t = 27 / 216 }}}
{{{ 216 = 27t }}}
{{{ t = 216/27 }}}
{{{ t = 8 }}}
It will take him 8 hrs