A luxury car handles a tracking route sector of 240 km. It finishes the first half segment stretch at 40 km/h and the second half sector at 60 km/h. Find the mean average speed recorded across the full route. MCQ with Answer and Explanation
A luxury car handles a tracking route sector of 240 km. It finishes the first half segment stretch at 40 km/h and the second half sector at 60 km/h. Find the mean average speed recorded across the full route.
A. 48 km/h
B. 50 km/h
C. 52 km/h
D. 46 km/h
Answer: Option A
Solution (By JKSSB Mock Tests)
Average Speed across sectors = 2xy / (x + y) = (2 * 40 * 60) / (40 + 60) = 4800 / 100 = 48 km/h.
Explanation:
By 8:00 AM, the first person covers 40 * 2 = 80 km. Relative speed = 60 - 40 = 20 km/h. Time to meet = 80 / 20 = 4 hours. Distance from A = Speed of second person * Time = 60 * 4 = 240 km.
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