A person travels a distance of 120 km at 40 km/h and returns at 60 km/h. Find the total time spent for the entire round trip. MCQ with Answer and Explanation
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Question #1
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A runner covers a circular path of radius 70 meters in 44 seconds. What is his speed in km/h?
Correct Answer: Option D
Explanation:
Circumference of circular path = 2 * (22/7) * 70 = 440 meters. Speed = 440 / 44 = 10 m/s. In km/h = 10 * (18/5) = 36 km/h.
Circumference of circular path = 2 * (22/7) * 70 = 440 meters. Speed = 440 / 44 = 10 m/s. In km/h = 10 * (18/5) = 36 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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Walking at 5/6 of his baseline speed, an officer reaches his desk 12 minutes late. What is his baseline typical time?
Correct Answer: Option D
Explanation:
New speed = 5/6 of usual speed => New time = 6/5 of usual time. Difference = 1/5 of usual time = 12 minutes. Typical baseline time = 12 * 5 = 60 minutes.
New speed = 5/6 of usual speed => New time = 6/5 of usual time. Difference = 1/5 of usual time = 12 minutes. Typical baseline time = 12 * 5 = 60 minutes.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A motor car finishes a journey in 10 hours. The first half is covered at 42 km/h and the second half at 48 km/h. Find the total distance of the journey.
Correct Answer: Option C
Explanation:
Let half distance be d. d/42 + d/48 = 10 => (8d + 7d)/336 = 10 => 15d = 3360 => d = 224 km. Total distance = 2d = 448 km.
Let half distance be d. d/42 + d/48 = 10 => (8d + 7d)/336 = 10 => 15d = 3360 => d = 224 km. Total distance = 2d = 448 km.
This question belongs to:
Maths
Time Speed and Distance
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