Question

a motorist traves from a town a to a town b,145km distance in 3hrs 45 mins . find his average speed. in km\h

Answer 1

3hrs 45 mins is 3.75 hrs. Then the speed is:

$$v = \dfrac{145km}{3.75h}\approx 38.7km/h$$

Answer. 38.7 km/h.