A train 120 meters long crosses a platform 180 meters long in 15 seconds. Find the speed of the train in km/h. MCQ with Answer and Explanation

Question
A train 120 meters long crosses a platform 180 meters long in 15 seconds. Find the speed of the train in km/h.
A. 64 km/h
B. 80 km/h
C. 72 km/h
D. 75 km/h
Answer: Option C
Solution (By JKSSB Mock Tests)
Total distance = 120 + 180 = 300 meters. Speed = 300 / 15 = 20 m/s. Conversion to km/h = 20 * (18/5) = 72 km/h.
This question belongs to: Maths Time Speed and Distance
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Practice More Time Speed and Distance Questions

Question #1
A driver spans a highway path of 400 km. If the uniform speed is boosted by 10 km/h, the trip wraps up in 2 hours less. Find the initial speed.
A. 35 km/h
B. 45 km/h
C. 40 km/h
D. 50 km/h
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Correct Answer: Option C

Explanation:
Let original speed be s. 400/s - 400/(s+10) = 2 => 200/s - 200/(s+10) = 1 => 2000 = s(s+10). Solving s^2 + 10s - 2000 = 0 yields (s-40)(s+50) = 0. Speed = 40 km/h.
This question belongs to: Maths Time Speed and Distance
Question #2
A man rows a distance of 12 km downstream in 1.5 hours and returns upstream in 3 hours. Find the speed of the river current.
A. 2.5 km/h
B. 2.0 km/h
C. 1.8 km/h
D. 2.2 km/h
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Correct Answer: Option B

Explanation:
Downstream speed = 12 / 1.5 = 8 km/h. Upstream speed = 12 / 3 = 4 km/h. Speed of current = (8 - 4) / 2 = 4 / 2 = 2 km/h.
This question belongs to: Maths Time Speed and Distance
Question #3
A boat can row 14 km/h in still water and the speed of the current is 2 km/h. Find the time taken to row 36 km upstream.
A. 2.5 hours
B. 4.0 hours
C. 3.0 hours
D. 3.5 hours
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Correct Answer: Option C

Explanation:
Upstream speed = 14 - 2 = 12 km/h. Time taken = 36 / 12 = 3 hours.
This question belongs to: Maths Time Speed and Distance
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