A car driver leaves Bangalore at 8:30 AM and expects to reach a place 300 km away at 12:30 PM. At 10:30 AM he finds that he has covered only 40% of the distance. By how much must he increase the speed of the car to reach on scheduled time? MCQ with Answer and Explanation
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Question #1
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A sound wave travels at 340 m/s. How much distance in kilometers does it cover in 20 seconds?
Correct Answer: Option C
Explanation:
Distance = Speed * Time = 340 * 20 = 6800 meters. Converting to kilometers = 6800 / 1000 = 6.8 km.
Distance = Speed * Time = 340 * 20 = 6800 meters. Converting to kilometers = 6800 / 1000 = 6.8 km.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A thief is noticed by a policeman from a distance of 200 meters. The thief starts running and the policeman chases him. The thief and the policeman run at the rate of 10 km/h and 11 km/h respectively. What is the distance between them after 6 minutes?
Correct Answer: Option C
Explanation:
Relative speed = 11 - 10 = 1 km/h = 1 * (5/18) = 5/18 m/s. Distance covered in 6 minutes (360 seconds) = (5/18) * 360 = 100 meters. Remaining distance = 200 - 100 = 100 meters.
Relative speed = 11 - 10 = 1 km/h = 1 * (5/18) = 5/18 m/s. Distance covered in 6 minutes (360 seconds) = (5/18) * 360 = 100 meters. Remaining distance = 200 - 100 = 100 meters.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A private sedan tracks a sector path length of 360 km in 4 hours 30 minutes. Find its mean average speed index.
Correct Answer: Option B
Explanation:
Time = 4.5 hours. Speed index = Sector Distance / Time = 360 / 4.5 = 80 km/h.
Time = 4.5 hours. Speed index = Sector Distance / Time = 360 / 4.5 = 80 km/h.
This question belongs to:
Maths
Time Speed and Distance
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