Answer:
345km
Step-by-step explanation:
Find the average speed of the car.
720km ÷ 6hrs = 120km/h
220km ÷ 2hrs = 110km/h
Find the average of the 2 speeds.
[tex]\frac{(120+110)}{2} = \frac{230}{2} = 115km/h[/tex]
Multiply the average by the # of hours.
115km/h × 3hrs = 345km