A sound wave covers a distance of 1.36 km in 4 seconds. Find the speed of sound in m/s. MCQ with Answer and Explanation
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Question #1
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Two express trains 220 meters and 180 meters long are tracking parallel in identical directions at speeds of 90 km/h and 72 km/h. Find the duration to pass each other.
Correct Answer: Option A
Explanation:
Total distance = 220 + 180 = 400 meters. Relative speed in identical direction = 90 - 72 = 18 km/h = 5 m/s. Time taken = 400 / 5 = 80 seconds.
Total distance = 220 + 180 = 400 meters. Relative speed in identical direction = 90 - 72 = 18 km/h = 5 m/s. Time taken = 400 / 5 = 80 seconds.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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Walking at 6/7 of his normal pace, a man is 12 minutes late to his workplace. What is his normal time?
Correct Answer: Option B
Explanation:
New speed = 6/7 of normal pace => New time = 7/6 of normal time. Difference = 1/6 of normal time = 12 minutes. Normal time = 12 * 6 = 72 minutes.
New speed = 6/7 of normal pace => New time = 7/6 of normal time. Difference = 1/6 of normal time = 12 minutes. Normal time = 12 * 6 = 72 minutes.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A transport truck covers a route track of 480 km in 8 hours. How much time will it require to clear a distance path of 360 km given it tracks at the same speed?
Correct Answer: Option C
Explanation:
Speed of truck = 480 / 8 = 60 km/h. Time taken for 360 km path = 360 / 60 = 6 hours.
Speed of truck = 480 / 8 = 60 km/h. Time taken for 360 km path = 360 / 60 = 6 hours.
This question belongs to:
Maths
Time Speed and Distance
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