Correct option is B
Given:
Total Distance = 270 km
In the first 4 hours, its speed is 50 km/h and it decreases to 35 km/h in the remaining journey.
Formula Used:
Average Speed = Total Distance/Total Time
Solution:
Total Distance = 270 km
In the first 4 hours, its speed is 50 km/h
⇒ Distance covered = 50 × 4 = 200 km
Remaining distance covered in 35 km/h
⇒ Time = (270 - 200)/35
⇒ 2 h
Total Time = 4 + 2 = 6 h
Average speed = 270/6
⇒ 45 km/h
∴ The average speed of the bike is 45 km/h.
