Question : A bus travels 60 km in the first hour, 40 km in the second hour and 50 km in the third hour. What is the average speed of the bus?
Option 1: 60 km/hr
Option 2: 45 km/hr
Option 3: 50 km/hr
Option 4: 55 km/hr
Correct Answer: 50 km/hr
Solution :
The sum of the distances travelled in each of the three hours:
Total distance = 60 km + 40 km + 50 km = 150 km
Now, let's find the total time taken.
⇒ Total time = 1hour + 1hour + 1hour = 3hours
So, average speed = $\frac{\text{Total distance}}{\text{Total time}}$
⇒ Average speed = $\frac{150~km}{3~hours}$
⇒ Average speed = 50 km/h
Hence, the correct answer is 50 km/h.
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