A bus covers first 200 km of a journey in 4 hours and the next 600 km in 6 hours. What is the average speed of the bus for the whole journey?
Answer & explanation
Correct answer: option 4
Average speed = \(\frac{Total\; Distance }{Total \; Time }\)
Total distance = 200 + 600 = 800 km
Total Time = 4 + 6 = 10 hours
Average speed = \(\frac{800}{10}\)
= 80 km/h