A bucket full of water weighs $5 \mathrm{kg}$, it is pulled from a well $20 \mathrm{m}$ deep. There is a small hole in the bucket through which water leaks at a constant rate. If it is observed that for every metre the bucket loses $0.2 \mathrm{kg}$ mass of water, then the total work done in pulling the bucket up from the well is [$g=10 \mathrm{m} {\mathrm{s}}^{-2}$]

• Correct answer
  A

  $600 \mathrm{J}$
• B

  $400 \mathrm{J}$
• C

  $100 \mathrm{J}$
• D

  $500 \mathrm{J}$

Hence, the correct answer is option: 'A'.