A train passes a structural signal box in 8 seconds. If the length of the train is 120 meters, find its speed in km/h. MCQ with Answer and Explanation
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Question #1
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A train 260 meters long passes a roadside signal box in 13 seconds. How long will it take to pass a bridge 440 meters long?
Correct Answer: Option A
Explanation:
Speed of train = 260 / 13 = 20 m/s. Total distance to cross the bridge = 260 + 440 = 700 meters. Time required = 700 / 20 = 35 seconds.
Speed of train = 260 / 13 = 20 m/s. Total distance to cross the bridge = 260 + 440 = 700 meters. Time required = 700 / 20 = 35 seconds.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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In a 200-meter sprint, X beats Y by 20 meters and Y beats Z by 10 meters. By how many meters does X beat Z in the same race?
Correct Answer: Option C
Explanation:
When X covers 200m, Y covers 180m. When Y covers 200m, Z covers 190m. Thus, when Y covers 180m, Z covers 190 * (180 / 200) = 171m. Therefore, when X covers 200m, Z covers 171m. X beats Z by 200 - 171 = 29 meters.
When X covers 200m, Y covers 180m. When Y covers 200m, Z covers 190m. Thus, when Y covers 180m, Z covers 190 * (180 / 200) = 171m. Therefore, when X covers 200m, Z covers 171m. X beats Z by 200 - 171 = 29 meters.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A swimmer registers a pace track of 15 km downstream in 3 hours and handles 9 km upstream back in 3 hours. Find the net tracking speed of the current flow.
Correct Answer: Option B
Explanation:
Downstream speed = 15 / 3 = 5 km/h. Upstream speed = 9 / 3 = 3 km/h. Speed of current flow = (5 - 3) / 2 = 2 / 2 = 1.0 km/h.
Downstream speed = 15 / 3 = 5 km/h. Upstream speed = 9 / 3 = 3 km/h. Speed of current flow = (5 - 3) / 2 = 2 / 2 = 1.0 km/h.
This question belongs to:
Maths
Time Speed and Distance
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