In a 600-meter race, A finishes in 66 seconds and B finishes in 75 seconds. By what distance does A beat B?
A. 80 meters
B. 68 meters
C. 75 meters
D. 72 meters
Answer: Option D
Solution (By JKSSB Mock Tests)
Speed of B = 600 / 75 = 8 m/s. Distance covered by B when A crosses the finish line at 66 seconds = 8 * 66 = 528 meters. Winning margin = 600 - 528 = 72 meters.
Explanation:
Total distance = 40 + 60 = 100 km. Time for first sector = 40 / 20 = 2 hours. Time for second sector = 60 / 30 = 2 hours. Total time = 4 hours. Average speed = 100 / 4 = 25 km/h.
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