A perfectly stirred-and -insulated tank, initially contains 360 L oil (p=1050 kg/m3, CP=2100 j/kg.oC, TO=35 oC). At this time, the oil is being heated by electrical energy: Q=22exp(-0.05t), where Q is rate thermal energy transferred, in kW, and t is time in minutes. How long will it take, in minutes, for the oil temperature to reach 60 oC ? Lütfen birini seçin: а. 35.9 b. 27.9 С. 31.9 d. 29.9 е. 33.9

A perfectly stirred-and -insulated tank, initially contains 360 L oil (p=1050 kg/m3, CP=2100 j/kg.oC, TO=35 oC). At this time, the oil is being heated by electrical energy: Q=22exp(-0.05t), where Q is rate thermal energy transferred, in kW, and t is time in minutes. How long will it take, in minutes, for the oil temperature to reach 60 oC ? Lütfen birini seçin: а. 35.9 b. 27.9 С. 31.9 d. 29.9 е. 33.9