so maximum permissible error in
$Y = \frac{{\Delta Y}}{Y} \times 100 $ $= \left( {\frac{{\Delta M}}{M} + \frac{{\Delta g}}{g} + \frac{{\Delta L}}{L} + \frac{{2\Delta D}}{D} + \frac{{\Delta l}}{l}} \right) \times 100$
$ = \left( {\frac{1}{{300}} + \frac{1}{{981}} + \frac{1}{{2820}} + 2 \times \frac{1}{{41}} + \frac{1}{{87}}} \right) \times 100$
$ = 0.065 \times 100 = 6.5\% $