A car covers a distance of 120 km at 40 km/h and another 180 km at 60 km/h. Find the average speed for the complete trip. 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 C
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.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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Two express trains 200 meters and 150 meters long are moving in the same direction at 72 km/h and 54 km/h respectively. Find the time taken by the faster train to cross the slower train completely.
Correct Answer: Option D
Explanation:
Total distance = 200 + 150 = 350 meters. Relative speed in same direction = 72 - 54 = 18 km/h = 5 m/s. Time taken = 350 / 5 = 70 seconds.
Total distance = 200 + 150 = 350 meters. Relative speed in same direction = 72 - 54 = 18 km/h = 5 m/s. Time taken = 350 / 5 = 70 seconds.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A commuter walking at 5/6 of his regular pace reaches his station 10 minutes late. Find his typical time to reach the station.
Correct Answer: Option B
Explanation:
New speed = 5/6 of usual speed => New time = 6/5 of usual time. Difference = 1/5 of usual time = 10 minutes. Typical baseline time = 10 * 5 = 50 minutes.
New speed = 5/6 of usual speed => New time = 6/5 of usual time. Difference = 1/5 of usual time = 10 minutes. Typical baseline time = 10 * 5 = 50 minutes.
This question belongs to:
Maths
Time Speed and Distance
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