A person covers a distance of 80 km at 20 km/h and another 120 km at 40 km/h. Find his average speed for the whole journey. MCQ with Answer and Explanation
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Question #1
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A delivery boy on a scooter covers a distance of 24 km at a speed of 16 km/h. Find the time taken in minutes.
Correct Answer: Option A
Explanation:
Time taken = Distance / Speed = 24 / 16 = 1.5 hours. Converting to minutes = 1.5 * 60 = 90 minutes.
Time taken = Distance / Speed = 24 / 16 = 1.5 hours. Converting to minutes = 1.5 * 60 = 90 minutes.
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Maths
Time Speed and Distance
Question #2
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Excluding minor platform corridor stops, the speed of an express route train is 84 km/h, and including stops it tracks at 70 km/h. How many minutes does it spend resting at stops per hour?
Correct Answer: Option D
Explanation:
Stoppage time per hour = (84 - 70) / 84 = 14 / 84 = 1/6 hour. In minutes = (1/6) * 60 = 10 minutes.
Stoppage time per hour = (84 - 70) / 84 = 14 / 84 = 1/6 hour. In minutes = (1/6) * 60 = 10 minutes.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A wheel makes 2000 revolutions in covering a distance of 44 km. Find the radius of the wheel.
Correct Answer: Option A
Explanation:
Distance covered in 1 revolution = Total Distance / Number of Revolutions = 44000 meters / 2000 = 22 meters. Circumference = 2 * (22/7) * r = 22 => 44r / 7 = 22 => r = 154 / 44 = 3.5 meters.
Distance covered in 1 revolution = Total Distance / Number of Revolutions = 44000 meters / 2000 = 22 meters. Circumference = 2 * (22/7) * r = 22 => 44r / 7 = 22 => r = 154 / 44 = 3.5 meters.
This question belongs to:
Maths
Time Speed and Distance
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