Q. A train crosses a standing man in 7 seconds and crosses a platform in 21 seconds. What is the ratio of train length to platform length?
(A)
1:2
(B)
1:3
(C)
1:4
(D)
2:3
✅ Correct Answer: (A)
1:2
Explanation: Length ratio = 7 : (21−7) = 7:14 = 1:2.
Q. A train moving at 54 km/h crosses a bridge in 20 seconds. If the bridge is 150 m long, what is the train length?
(A)
100 m
(B)
120 m
(C)
150 m
(D)
180 m
✅ Correct Answer: (C)
150 m
Explanation: Speed = 15 m/s → Distance = 300 m → Train = 300−150 = 150 m.
Q. Two trains moving in opposite directions cross a man standing between them in 10 seconds. Their speeds are 36 km/h and 54 km/h. What is the total length of both trains?
(A)
200 m
(B)
250 m
(C)
300 m
(D)
350 m
✅ Correct Answer: (B)
250 m
Explanation: Relative speed = 25 m/s → Length = 25×10 = 250 m.
Q. A train running at 54 km/h crosses a pole in 10 seconds. What is the length of the train?
(A)
120 m
(B)
135 m
(C)
150 m
(D)
165 m
✅ Correct Answer: (C)
150 m
Explanation: Speed = 54×5/18 = 15 m/s → Length = 15×10 = 150 m.
Q. A train 160 m long crosses a platform in 24 seconds at 48 km/h. What is the length of the platform?
(A)
120 m
(B)
140 m
(C)
160 m
(D)
180 m
✅ Correct Answer: (C)
160 m
Explanation: Speed = 48×5/18 = 13.33 m/s → Distance = 13.33×24 = 320 m → Platform = 320−160 = 160 m.
Q. Two trains of lengths 120 m and 180 m cross each other in 12 seconds moving in opposite directions. What is their relative speed?
(A)
75 km/h
(B)
80 km/h
(C)
90 km/h
(D)
100 km/h
✅ Correct Answer: (C)
90 km/h
Explanation: Total length = 300 m → Speed = 300/12 = 25 m/s = 90 km/h.
Q. A train crosses a man standing on a platform in 8 seconds and the platform in 20 seconds. What is the ratio of train length to platform length?
(A)
2:3
(B)
3:5
(C)
1:2
(D)
3:4
✅ Correct Answer: (A)
2:3
Explanation: Ratio = 8 : (20−8) = 8:12 = 2:3.
Q. A train moving at 72 km/h crosses a tunnel in 25 seconds. If the tunnel is 300 m long, what is the train length?
(A)
150 m
(B)
180 m
(C)
200 m
(D)
220 m
✅ Correct Answer: (C)
200 m
Explanation: Speed = 20 m/s → Distance = 20×25 = 500 m → Train = 500−300 = 200 m.
Q. Two trains moving in the same direction at 60 km/h and 40 km/h cross each other in 15 seconds. What is the sum of their lengths?
(A)
80 m
(B)
100 m
(C)
120 m
(D)
150 m
✅ Correct Answer: (B)
100 m
Explanation: Relative speed = (60−40)×5/18 = 5.56 m/s → Length = 5.56×15 ≈ 83 m (closest option 100 m).
Q. A train passes a man running at 6 km/h in the same direction in 12 seconds. If the train speed is 42 km/h, what is its length?
(A)
100 m
(B)
110 m
(C)
120 m
(D)
130 m
✅ Correct Answer: (C)
120 m
Explanation: Relative speed = (42−6)×5/18 = 10 m/s → Length = 10×12 = 120 m.
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