Question : A person covers the first 26 km in 60 minutes and the next 34 km in 30 minutes. What is his average speed for the whole journey?
Option 1: 40 km/hr
Option 2: 46 km/hr
Option 3: 32 km/hr
Option 4: 38 km/hr
Correct Answer: 40 km/hr
Solution :
We know,
Average Speed = $\frac{\text{Total Distance}}{\text{Total Time}}$
= $\frac{26+34}{1 +0.5}$ [Total time = 60 minutes + 30 minutes = 1.5 hours]
= $\frac{60}{1.5}$
= 40 km/hr
Hence, the correct answer is 40 km/hr.
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