A man walks a certain distance at 5 km/h and runs back at 15 km/h. What is his average speed for the entire journey? MCQ with Answer and Explanation
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Question #1
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A train 180 meters long passes a static utility pole in 9 seconds. Find the time it takes to completely pass a platform of length 300 meters.
Correct Answer: Option B
Explanation:
Speed of train = 180 / 9 = 20 m/s. Total distance to pass platform = 180 + 300 = 480 meters. Time taken = 480 / 20 = 24 seconds.
Speed of train = 180 / 9 = 20 m/s. Total distance to pass platform = 180 + 300 = 480 meters. Time taken = 480 / 20 = 24 seconds.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A mechanical wheel has a radius of 7 cm. How many revolutions are required to cover a linear distance of 44 meters?
Correct Answer: Option D
Explanation:
Circumference of the wheel = 2 * (22/7) * 7 = 44 cm = 0.44 meters. Total distance = 44 meters. Number of revolutions = 44 / 0.44 = 100.
Circumference of the wheel = 2 * (22/7) * 7 = 44 cm = 0.44 meters. Total distance = 44 meters. Number of revolutions = 44 / 0.44 = 100.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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In a 100-meter race, A can beat B by 15 meters and C by 28 meters. In a race of 85 meters, by how many meters can B beat C?
Correct Answer: Option B
Explanation:
When A covers 100m, B covers 85m and C covers 72m. This means in a distance where B covers 85 meters, C covers 72 meters. Therefore, B beats C by 85 - 72 = 13 meters.
When A covers 100m, B covers 85m and C covers 72m. This means in a distance where B covers 85 meters, C covers 72 meters. Therefore, B beats C by 85 - 72 = 13 meters.
This question belongs to:
Maths
Time Speed and Distance
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