[填空题]
In a hot day’s race, a bicyclist cv d,igk2r5n53p ,me5 0cu8hno g: cbexonsumes 8jk2loyqpk9sp8yk :-+6-/(a rcw 9c4dep iiup.0 L of water over the span of four hours. Making the approximation that all of the cyclist’s energy goes into evaporating this water as sweat, how much energy in kcal did the rider use during the ride? ( yp8-i49l- i 2k kcpscyuje pa6d r+k(/w9:pqoSince the efficiency of the rider is only about 20%, most of the energy consumed does go to heat, so our approximation is not far off.) kcal
