DonDon't

DonDon't a car travelled at a speed of 90km/h.it left town ponpon at 11.00a.m.what time will it reach town dondon which is255km away? T T “T “T T T^T T^T T T T^T T^T T^T T^T T T while(*t)t++; t--; T.....T.T.. 求大神救我!T^T T^T T^T