A commuter walking at 5/6 of his regular pace reaches his station 10 minutes late. Find his typical time to reach the station. MCQ with Answer and Explanation
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Question #1
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A sound wave travels at a speed of 340 m/s. Find the distance covered by the wave in 10 seconds.
Correct Answer: Option B
Explanation:
Distance = Speed * Time = 340 * 10 = 3400 meters = 3.4 km.
Distance = Speed * Time = 340 * 10 = 3400 meters = 3.4 km.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A high-speed train covers a distance between two terminals at 300 km/h in 4 hours. At what speed must it travel to cover the same distance in 3 hours and 20 minutes?
Correct Answer: Option D
Explanation:
Distance = Speed * Time = 300 * 4 = 1200 km. New time = 3 hours 20 minutes = 10/3 hours. New required speed = Distance / New time = 1200 / (10/3) = 1200 * 3 / 10 = 360 km/h.
Distance = Speed * Time = 300 * 4 = 1200 km. New time = 3 hours 20 minutes = 10/3 hours. New required speed = Distance / New time = 1200 / (10/3) = 1200 * 3 / 10 = 360 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A train 120 meters long running at 45 km/h crosses a bridge in 30 seconds. Find the length of the bridge.
Correct Answer: Option D
Explanation:
Speed of train = 45 * (5/18) = 12.5 m/s. Total distance covered in 30 seconds = 12.5 * 30 = 375 meters. Length of bridge = 375 - 120 = 255 meters.
Speed of train = 45 * (5/18) = 12.5 m/s. Total distance covered in 30 seconds = 12.5 * 30 = 375 meters. Length of bridge = 375 - 120 = 255 meters.
This question belongs to:
Maths
Time Speed and Distance
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