Question : A truck travels 40 km in the first hour and 50 km in the second hour. What is the average speed of the truck?
Option 1: 45 km/hr
Option 2: 40 km/hr
Option 3: 48 km/hr
Option 4: 50 km/hr
Correct Answer: 45 km/hr
Solution :
In this case, the truck travels a total distance of 40 km + 50 km = 90 km in 2 hours.
$\text{Average speed}=\frac{\text{Total distance}}{{\text{Total time}}}$
$\therefore$ The average speed of the truck = $\frac{90 \, \text{km}}{2 \, \text{hours}}$ = 45 km/hr
Hence, the correct answer is 45 km/hr.
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