She will burn 18.17 KJ of energy in 2 days.
Energy can be measured in both joules and calories. The following units of energy are converted as follows:
1 calorie = 4.184 Joules
2171 calories = (2171 × 4.184) joules
= 9083.464 Joules
Since 1 kilojoules = 1000 joules
9083.464 Joules = (9083.464/1000) KJ
= 9.083 KJ
This means that the person burns 9.083 KJ of energy per day.
Hence, in 2days, the person will burn;
2 × 9.083 KJ
= 18.17 KJ of energy.
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