A person trying to lose weight by burning fat lifts a mass of `10 kg` upto a height of `1m is 1000` time . Assume that the potential energy lost each time be lower the mass is dissipated . How much far will be use up considering the work done only when the weight is lifted up ? Far supplies `3.8 xx 10^(7) J` of energy per kg wich is canverted to mechanical energy with `x 20 %` efficiency rate Take ` = 9.8 ms^(-2)`

Options

A. `6.45 xx 10^-3 kg`
B. `9.89 xx 10 ^-3 kg`
C. `12.89 xx 10^-3 kg`
D. `2.45 xx 10^-3 kg`