$$ Coarse aggregate is placed in a rigid bucket androdded with a tamping rod to determine its unit

weight. The following data are obtained:

$$ Volume of bucket $=0\mathrm{.}01$ m$3$

$$ Weight of empty bucket $=8\mathrm{.}4$ kg

$$ Weight of bucket filled with dry rodded coarse aggregate $=25\mathrm{.}4$ kg

$($a$)$ Calculate the dry$-$rodded unit weight

$($b$)$ If the oven$-$dried bulk specific gravity of the

aggregate is $2\mathrm{.}63,$ calculate the percent voids in the aggregate