here we have given the weigh of butterflies between 0.003 gm and 3 gm .
here we need to give a reason for why it wont make sense if we round off the weigh of butterfly to nearest hundredth of a gram .
we know that if weigh is less than 0.005 gm it will be rounded off to zero
so the here rounding off to nearest hundredth wont make sense.