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Four trains depart from City X at different times for City Y, which is 500 km away. Their departure times, speeds, and number of stops are: | Train | Depart Time | Speed (km/h) | Number of stops | Stop duration each | |-------|-------------|--------------|-----------------|---------------------| | P | 6:00 AM | 100 | 4 | 5 min | | Q | 7:30 AM | 125 | 2 | 10 min | | R | 9:00 AM | 80 | 5 | 4 min | | S | 10:00 AM | 150 | 3 | 5 min | Total travel time for train R (including stops):
A6.58 hours
B6.5 hours
C6.25 hours
DRun time: 500/80 = 6.25 hr; Stops: 5×4/60 = 0.333 hr; Total ≈ 6.58 hr
Answer & Solution
Correct answer: A. 6.58 hours
Run: 500/80 = 6.25 hours. Stops: 5 × 4 = 20 minutes = 1/3 hour. Total: 6.25 + 0.333 = 6.583... ≈ 6.58 hours.
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