Question : An auto-rickshaw travels 20 km from point P to Q and then 25 km from Q to R. The total time taken was 1 hour 30 minutes. What was the average speed of the auto-rickshaw?
Option 1: 15 km/hr
Option 2: 30 km/hr
Option 3: 45 km/hr
Option 4: 60 km/hr
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Correct Answer: 30 km/hr
Solution : Distance from P to Q = 20 km Distance from Q to R = 25 km Total distance = 20 + 25 = 45 km Total time = 1 hour 30 minutes = $1+\frac{30}{60}$ = 1.5 hours We know that, $\text{Average speed}=\frac{\text{Total distance}}{{\text{Total time}}}$ = $\frac{45}{1.5}$ = 30 km/hr Hence, the correct answer is 30 km/hr.
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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
Question : A car travels at the speed of 40 km/hr for the first hour and 60 km/hr for the next hour. What will be the average speed of the car?
Option 2: 40 km/hr
Option 4: 45 km/hr
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 3: 48 km/hr
Option 4: 50 km/hr
Question : A person covers the first 30 km in 60 minutes and the next 40 km in 30 minutes. What is his average speed for the whole journey?
Option 1: $\frac{140}{3}$ km/hr
Option 3: $\frac{160}{3}$ km/hr
Question : A person covers the first 25 km in 60 minutes and the next 38 km in 30 minutes. What is his average speed for the whole journey?
Option 1: 46 km /hr
Option 2: 49 km/hr
Option 3: 42 km/hr
Option 4: 36 km /hr
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