P-CHEM HELP!! Thermodynamics?

A hiker caught in a thunderstorm loses heat when her clothing becomes wet. She is packing emergency rations that if completely metabolized, will release 30 kJ of heat per gram of rations consumed. How much rations must the hiker consume to avoid a reduction in body temperature of 4 K as a result of heat loss? ume the heat capacity equals that of water. ume the hiker weighs 55kg. State any additional umptions.