Train 1 leaves A at 8 am and reaches B at 2 pm. Train 2 leaves B at 10 am and…
2021
Train 1 leaves A at 8 am and reaches B at 2 pm. Train 2 leaves B at 10 am and reaches A at 6 pm. What approximate time do the two trains meet?
- A.
12:17 pm
- B.
1:12 pm
- C.
12:32 pm
- D.
11:58 am
Attempted by 7 students.
Show answer & explanation
Correct answer: A
Calculate travel times: Train 1 (8 am to 2 pm) = 6 hours. Train 2 (10 am to 6 pm) = 8 hours.
Set distance (D): Let the total distance be D. Speed of Train 1 = D/6; Speed of Train 2 = D/8.
Set up equation: Let 't' be the time in hours after 8 am.
Train 1 travels for 't' hours.
Train 2 travels for '(t - 2)' hours (starts 2 hours later).
Sum of distances = D: (D/6)t + (D/8)(t - 2) = D.
Solve for t: (t/6) + (t/8) - (2/8) = 1 => (4t + 3t) / 24 = 1 + 0.25 => 7t / 24 = 1.25.
7t = 30 => t ≈ 4.29 hours.
Convert time: 4 hours + 0.29 * 60 minutes ≈ 4 hours and 17 minutes after 8 am, which is 12:17 pm.
Final Answer: Option 1 (12:17 pm)