Walking at 4/5 of his normal pace, an official is 12 minutes late to his assignment station. Find his usual baseline time. MCQ with Answer and Explanation
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Question #1
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Excluding operational corridor stops, the speed of an inter-provincial bus is 60 km/h, and including stops it tracks at 48 km/h. How many minutes does it stop per hour?
Correct Answer: Option A
Explanation:
Stoppage time per hour = (60 - 48) / 60 = 12 / 60 = 1/5 hour. In minutes = (1/5) * 60 = 12 minutes.
Stoppage time per hour = (60 - 48) / 60 = 12 / 60 = 1/5 hour. In minutes = (1/5) * 60 = 12 minutes.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A person crosses a 500-meter long bridge in 4 minutes. Find his speed in km/h.
Correct Answer: Option D
Explanation:
Time = 4 minutes = 240 seconds. Speed = 500 / 240 = 25/12 m/s. In km/h = (25/12) * (18/5) = 5 * 1.5 = 7.5 km/h.
Time = 4 minutes = 240 seconds. Speed = 500 / 240 = 25/12 m/s. In km/h = (25/12) * (18/5) = 5 * 1.5 = 7.5 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A sound wave travels at 340 m/s. How much distance in kilometers does it cover in 20 seconds?
Correct Answer: Option A
Explanation:
Distance = Speed * Time = 340 * 20 = 6800 meters. Converting to kilometers = 6800 / 1000 = 6.8 km.
Distance = Speed * Time = 340 * 20 = 6800 meters. Converting to kilometers = 6800 / 1000 = 6.8 km.
This question belongs to:
Maths
Time Speed and Distance
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