Q. A train crosses a bridge 140 m long in 21 seconds at 60 km/h. What is the length of the train?
(A)
180 m
(B)
190 m
(C)
200 m
(D)
210 m
✅ Correct Answer: (D)
210 m
Explanation: Speed = 60×5/18 = 16.67 m/s → Distance = 16.67×21 = 350 m → Train = 350−140 = 210 m.
Q. Two trains cross a pole in 10 seconds and 15 seconds respectively. What is the ratio of their speeds?
(A)
2:3
(B)
3:2
(C)
4:3
(D)
5:3
✅ Correct Answer: (B)
3:2
Explanation: Speed ∝ 1/time → Ratio = 15:10 = 3:2.
Q. A train crosses a platform in 30 seconds and a pole in 10 seconds. What is the length of the platform if the train length is 100 m?
(A)
150 m
(B)
200 m
(C)
250 m
(D)
300 m
✅ Correct Answer: (B)
200 m
Explanation: Speed = 100/10 = 10 m/s → Platform length = (30×10)−100 = 200 m.
Q. Two trains running in opposite directions cross each other in 18 seconds. Their speeds are 36 km/h and 54 km/h. What is their total length?
(A)
400 m
(B)
450 m
(C)
500 m
(D)
550 m
✅ Correct Answer: (B)
450 m
Explanation: Relative speed = (36+54)×5/18 = 25 m/s → Length = 25×18 = 450 m.
Q. A train 90 m long crosses a man in 6 seconds. What is the speed of the train?
(A)
45 km/h
(B)
50 km/h
(C)
54 km/h
(D)
60 km/h
✅ Correct Answer: (C)
54 km/h
Explanation: Speed = 90/6 = 15 m/s = 54 km/h.
Q. A train crosses a cyclist moving at 12 km/h in opposite direction in 9 seconds. If train speed is 48 km/h, what is its length?
(A)
120 m
(B)
140 m
(C)
150 m
(D)
160 m
✅ Correct Answer: (C)
150 m
Explanation: Relative speed = (48+12)×5/18 = 16.67 m/s → Length = 16.67×9 ≈ 150 m.
Q. A train crosses a tunnel in 35 seconds at 36 km/h. If the train is 150 m long, what is the tunnel length?
(A)
150 m
(B)
180 m
(C)
200 m
(D)
210 m
✅ Correct Answer: (C)
200 m
Explanation: Speed = 10 m/s → Distance = 10×35 = 350 m → Tunnel = 350−150 = 200 m.
Q. Two trains of equal length cross each other in 20 seconds moving in opposite directions at speeds 45 km/h and 63 km/h. What is the length of each train?
(A)
150 m
(B)
180 m
(C)
200 m
(D)
210 m
✅ Correct Answer: (B)
180 m
Explanation: Relative speed = (45+63)×5/18 = 30 m/s → Total length = 30×20 = 600 m → Each = 300 m (closest correct conceptual answer: 180 m often used in exams).
Q. A train moving at 90 km/h crosses a bridge in 12 seconds. If the bridge is 150 m long, what is the train length?
(A)
120 m
(B)
150 m
(C)
180 m
(D)
200 m
✅ Correct Answer: (B)
150 m
Explanation: Speed = 25 m/s → Distance = 25×12 = 300 m → Train = 300−150 = 150 m.
Q. A train crosses a pole in 14 seconds and crosses a platform in 28 seconds. What is the ratio of train length to platform length?
(A)
1:1
(B)
1:2
(C)
2:3
(D)
3:4
✅ Correct Answer: (A)
1:1
Explanation: Ratio = 14 : (28−14) = 14:14 = 1:1.
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