(Originais Teachy 2023) - Question Medium of Physics

João decided to take a car trip to a neighboring city to visit some friends and discuss the importance of using renewable energies and sustainable technologies in their cities. To get to the location, João drove 100 km on a road and then continued on a highway for another 150 km. On the road, he drove at an average speed of 80 km/h, while on the highway, he managed to maintain an average speed of 100 km/h. (a) What was João's total travel time between the road and the highway? (b) What was João's average scalar speed during the entire trip? (c) Discuss how the use of an electric car could impact João's trip and what the possible environmental implications would be.