Question
Two trains start from points A and B, 300 km apart, and
travel towards each other. Train 1 starts from A at 60 km/h, while Train 2 starts from B at 40 km/h. Train 1 stops for 30 minutes after every 2 hours of travel. After how much time will they meet?Solution
Relative speed of trains = 60 + 40 = 100 km/h. Without halts, time to meet = 300 ÷ 100 = 3 hours. Train 1 travels for 2 hours before taking a 30-minute break. After 3 hours, Train 1 has taken 1 break, adding 0.5 hours. Total time = 3 + 0.5 = 3.5 hours. Correct option: e
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