what is tim drives an average 80 kmph for 3 hours 45 minuets how many kilometers does he drive???

3 hrs 45 min  =  3 + 3/4  hrs  =  15/4  hrs

Distance =  rate * time

80 km/ hr  * (15/4) hr   = (80*15)/4 km  = (20 * 15) km =  300 km