Correct Answer: 10 a.m.
Explanation:
Step 1: Understand the given information
Step 2: Calculate the head start of Train 1
Between 7 a.m. and 8 a.m., Train 1 travels for 1 hour at 20 kmph.
Distance covered by Train 1 in 1 hour = 20 km
Step 3: Remaining distance between the trains at 8 a.m.
Remaining distance = 110 - 20 = 90 km
Step 4: Use relative speed to find meeting time
From 8 a.m., both trains are moving towards each other.
Combined speed = 20 kmph + 25 kmph = 45 kmph Time to meet = Distance / Relative speed = 90 / 45 = 2 hours
Step 5: Add the time to 8 a.m.
8 a.m. + 2 hours = 10 a.m.
Answer: 10:00 a.m.
The two trains will meet at 10:00 a.m..
This is a classic relative speed problem involving two trains starting at different times. The key is to account for the early start of the first train and then apply the concept of relative speed when both are moving towards each other. This approach is commonly tested in aptitude and entrance exams.
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