It takes <i>ab</i> man-hours to paint <i>c</i> square metres of the bridge and
hence <br clear="all" /><table border="0" align="left"><tr><td nowrap="nowrap"></td><td nowrap="nowrap" align="center">
<i>ab</i><hr noshade="noshade" size="1" /><i>c</i><br /></td><td nowrap="nowrap" align="center">

</td></tr></table><br /> man-hours to paint 1 square metre. So <i>d</i> men
will take <br clear="all" /><table border="0" align="left"><tr><td nowrap="nowrap"></td><td nowrap="nowrap" align="center">
<i>ab</i><hr noshade="noshade" size="1" /><i>cd</i><br /></td><td nowrap="nowrap" align="center">

</td></tr></table><br /> hours to paint 1 square metre and
therefore <br clear="all" /><table border="0" align="left"><tr><td nowrap="nowrap"></td><td nowrap="nowrap" align="center">
<i>abe</i><hr noshade="noshade" size="1" /><i>cd</i><br /></td><td nowrap="nowrap" align="center">

</td></tr></table><br /> hours to paint <i>e</i> square metres.  




    


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