A car travels at 60 km/hr for the first 2 hours and 80 km/hr for the next 3 hours. What is the average speed of the car for the entire journey?
Show answer & explanation
Correct answer: B
Explanation
Given:
Speed for the first 2 hours = 60 km/h
Speed for the next 3 hours = 80 km/h
According to the formula:
Average Speed = Total Distance / Total Time
Distance covered in the first 2 hours = 60 × 2 = 120 km
Distance covered in the next 3 hours = 80 × 3 = 240 km
Total Distance = 120 + 240 = 360 km
Total Time = 2 + 3 = 5 hours
Average Speed = 360 / 5 = 72 km/h