A train 150 meters long passes a pole in 7.5 seconds. What is the speed of the train in km/h? MCQ with Answer and Explanation
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Question #1
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A train leaves a station at 4:00 PM and travels at an average speed of 60 km/h. Another train leaves the same station at 5:00 PM in the same direction at an average speed of 80 km/h. At what time will the second train catch up with the first train?
Correct Answer: Option A
Explanation:
By 5:00 PM, the first train has traveled for 1 hour and covered 60 km. Relative speed = 80 - 60 = 20 km/h. Time needed to catch up = 60 / 20 = 3 hours. Catch up time = 5:00 PM + 3 hours = 8:00 PM.
By 5:00 PM, the first train has traveled for 1 hour and covered 60 km. Relative speed = 80 - 60 = 20 km/h. Time needed to catch up = 60 / 20 = 3 hours. Catch up time = 5:00 PM + 3 hours = 8:00 PM.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A person row a boat 24 km upstream in 4 hours. If the speed of the current is 2 km/h, find the speed of the boat in still water.
Correct Answer: Option A
Explanation:
Upstream speed = 24 / 4 = 6 km/h. Upstream Speed = Speed in still water - Current speed => 6 = Speed in still water - 2 => Speed in still water = 8 km/h.
Upstream speed = 24 / 4 = 6 km/h. Upstream Speed = Speed in still water - Current speed => 6 = Speed in still water - 2 => Speed in still water = 8 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A motor car finishes a journey in 6 hours. It covers the first half of the distance at 40 km/h and the second half at 20 km/h. Find the total distance covered.
Correct Answer: Option A
Explanation:
Let the half distance be d. d / 40 + d / 20 = 6 => 3d / 40 = 6 => 3d = 240 => d = 80 km. Total distance = 2d = 160 km.
Let the half distance be d. d / 40 + d / 20 = 6 => 3d / 40 = 6 => 3d = 240 => d = 80 km. Total distance = 2d = 160 km.
This question belongs to:
Maths
Time Speed and Distance
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