A person runs at 8 km/h instead of 6 km/h and consequently covers 10 km more in the same timeframe. Find the baseline distance covered at his normal speed. MCQ with Answer and Explanation
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Question #1
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A sound wave covers a distance of 1.7 km in 5 seconds. What is the speed of sound in m/s?
Correct Answer: Option C
Explanation:
Distance = 1.7 km = 1700 meters. Speed = Distance / Time = 1700 / 5 = 340 m/s.
Distance = 1.7 km = 1700 meters. Speed = Distance / Time = 1700 / 5 = 340 m/s.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A wheel makes 1000 revolutions to cover a distance of 880 meters. Find the diameter of the wheel.
Correct Answer: Option A
Explanation:
Distance covered in 1 revolution = 880 / 1000 = 0.88 meters = 88 cm. Circumference = 2 * (22/7) * r = 88 cm => (44/7) * r = 88 => r = 14 cm. Diameter = 2r = 28 cm.
Distance covered in 1 revolution = 880 / 1000 = 0.88 meters = 88 cm. Circumference = 2 * (22/7) * r = 88 cm => (44/7) * r = 88 => r = 14 cm. Diameter = 2r = 28 cm.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A runner covers 200 meters in 22 seconds. Find his approximate speed in km/h.
Correct Answer: Option C
Explanation:
Speed = 200 / 22 m/s = 100 / 11 m/s. In km/h = (100 / 11) * (18/5) = 360 / 11 = 32.72 km/h.
Speed = 200 / 22 m/s = 100 / 11 m/s. In km/h = (100 / 11) * (18/5) = 360 / 11 = 32.72 km/h.
This question belongs to:
Maths
Time Speed and Distance
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