A sound wave maps along a linear distance path at 340 m/s. How many kilometers does it cover in exactly 25 seconds? MCQ with Answer and Explanation
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Question #1
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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
Question #2
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A train passes a 110-meter long bridge in 12 seconds and a standard sign post in 7 seconds. Find the length of the train.
Correct Answer: Option D
Explanation:
Time taken to cross the bridge alone = 12 - 7 = 5 seconds. Speed of train = 110 / 5 = 22 m/s. Length of train = Speed * Time to cross sign post = 22 * 7 = 154 meters.
Time taken to cross the bridge alone = 12 - 7 = 5 seconds. Speed of train = 110 / 5 = 22 m/s. Length of train = Speed * Time to cross sign post = 22 * 7 = 154 meters.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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The speed of a train is 72 km/h. How many meters does it cross in 15 seconds?
Correct Answer: Option D
Explanation:
Speed = 72 * (5/18) = 20 m/s. Distance in 15 seconds = Speed * Time = 20 * 15 = 300 meters.
Speed = 72 * (5/18) = 20 m/s. Distance in 15 seconds = Speed * Time = 20 * 15 = 300 meters.
This question belongs to:
Maths
Time Speed and Distance
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