Aakash travels the first 4 hours of his journey at 120 mph speed and remaining 6 hours at 50 mph speed. What is the average speed of Aakash’s travel (in mph)?
Explanation:
Average speed = (Total Distance)/(Total Time)
Total Distance = Distance covered in first 4 hours + Distance covered in next 6 hours.
Distance covered in first 4 hours = 4 × 120 = 480 miles
Distance covered in next 5 hours = 6 × 50 = 300 miles
∴ Total distance = 480 + 300 = 780 miles
Total time = 4 + 6 = 10 hours
Average speed = 780/10 = 78 mph
Hence, option (c).
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