The ratio between the speeds of two cars is 4 : 5. If the first car covers a distance of 320 km in 4 hours, what is the speed of the second car? MCQ with Answer and Explanation
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Question #1
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A drone flies at 25 m/s. Find its speed in km/h.
Correct Answer: Option B
Explanation:
To convert m/s to km/h, multiply by 18/5. Speed = 25 * (18/5) = 90 km/h.
To convert m/s to km/h, multiply by 18/5. Speed = 25 * (18/5) = 90 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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Excluding regular stops, an express cargo van tracks at 84 km/h and including stops it tracks at 70 km/h. How many minutes does it stop per hour?
Correct Answer: Option B
Explanation:
Stoppage time per hour = (84 - 70) / 84 = 14 / 84 = 1/6 hour. In minutes = (1/6) * 60 = 10 minutes.
Stoppage time per hour = (84 - 70) / 84 = 14 / 84 = 1/6 hour. In minutes = (1/6) * 60 = 10 minutes.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A person walks from his house to office at 5 km/h and arrives 12 minutes late. If he walks at 6 km/h, he arrives 2 minutes late. Find the distance.
Correct Answer: Option C
Explanation:
Time difference = 12 - 2 = 10 minutes = 10/60 = 1/6 hours. Let distance be d. d / 5 - d / 6 = 1/6 => d / 30 = 1/6 => d = 5 km.
Time difference = 12 - 2 = 10 minutes = 10/60 = 1/6 hours. Let distance be d. d / 5 - d / 6 = 1/6 => d / 30 = 1/6 => d = 5 km.
This question belongs to:
Maths
Time Speed and Distance
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