A car has to travel a total distance of 300 km. The car covers the first half of the distance at a speed of 70 Km/hr and the remaining distance at a speed of 80 km/hr. What is the average speed of the entire journey?
A car has to travel a total distance of 300 km. The car covers the first half of the distance at a speed of 70 Km/hr and the remaining distance at a speed of 80 km/hr. What is the average speed of the entire journey?
A74.72 km/hr
B75.72 km/hr
C74.25 km/hr
D73.72 km/hr