calorific value of cowdung cake is7000J/kg. how much cowdung cakes are required to produce heat energy of 35000 J? Share with your friends Share 0 B Kishan answered this 5 kg 0 View Full Answer Warprince answered this 35000/7000=5Hence,5 kg of cowdung cakes are required to liberate heat of 35000 KJ. 0