A wire has mass 0.3±0.003  g , radius 0.5±0.005  mm  and length 6±0.06  cm . The maximum percentage error in the measurement of its density is

density=massvolume=masscross section area×lengthρ=mV=mπr2l∆ρρ=∆mm+2∆rr+∆ll        =0.0030.3+20.00050.05+0.066          = 3300+25500+6600         =4100Percentage error in density is ∆ρρ×100=4%