Walking at 3/4 of his normal pace, a student is 12 minutes late. Find his usual time. MCQ with Answer and Explanation
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Question #1
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A person runs around a circular track of circumference 600 meters. If his speed is 18 km/h, how many rounds can he complete in 10 minutes?
Correct Answer: Option B
Explanation:
Speed = 18 km/h = 5 m/s. Time = 10 minutes = 600 seconds. Total distance covered = 5 * 600 = 3000 meters. Number of rounds = 3000 / 600 = 5 rounds.
Speed = 18 km/h = 5 m/s. Time = 10 minutes = 600 seconds. Total distance covered = 5 * 600 = 3000 meters. Number of rounds = 3000 / 600 = 5 rounds.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A professional athlete tracks a loop of radius 140 meters in 88 seconds. What is his speed in km/h?
Correct Answer: Option D
Explanation:
Circumference of loop = 2 * (22/7) * 140 = 880 meters. Speed = 880 / 88 = 10 m/s. Converting to km/h = 10 * (18/5) = 36 km/h.
Circumference of loop = 2 * (22/7) * 140 = 880 meters. Speed = 880 / 88 = 10 m/s. Converting to km/h = 10 * (18/5) = 36 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A train running at 90 km/h overtakes a cyclist riding at 18 km/h in the same direction in 10 seconds. Find the length of the train.
Correct Answer: Option C
Explanation:
Relative speed = 90 - 18 = 72 km/h = 72 * (5/18) = 20 m/s. Length of train = Relative speed * Time = 20 * 10 = 200 meters.
Relative speed = 90 - 18 = 72 km/h = 72 * (5/18) = 20 m/s. Length of train = Relative speed * Time = 20 * 10 = 200 meters.
This question belongs to:
Maths
Time Speed and Distance
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