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? MCQ with Answer and Explanation
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Question #1
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A man rows a boat 30 km downstream in 3 hours and returns upstream in 6 hours. Find the speed of the stream.
Correct Answer: Option D
Explanation:
Downstream speed = 30 / 3 = 10 km/h. Upstream speed = 30 / 6 = 5 km/h. Speed of stream = (10 - 5) / 2 = 2.5 km/h.
Downstream speed = 30 / 3 = 10 km/h. Upstream speed = 30 / 6 = 5 km/h. Speed of stream = (10 - 5) / 2 = 2.5 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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An athlete loops a circular running stadium of radius 70 meters in exactly 44 seconds. Find the average moving speed.
Correct Answer: Option C
Explanation:
Circumference = 2 * (22/7) * 70 = 440 meters. Speed = Distance / Time = 440 / 44 = 10 m/s.
Circumference = 2 * (22/7) * 70 = 440 meters. Speed = Distance / Time = 440 / 44 = 10 m/s.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A local train spans a track sector in 40 minutes. If its speed is lowered by 6 km/h, it tracks the same sector in 45 minutes. Find the distance of this track sector.
Correct Answer: Option D
Explanation:
Let original speed be s. s * (40/60) = (s - 6) * (45/60) => 40s = 45s - 270 => 5s = 270 => s = 54 km/h. Distance = 54 * (40/60) = 36 km.
Let original speed be s. s * (40/60) = (s - 6) * (45/60) => 40s = 45s - 270 => 5s = 270 => s = 54 km/h. Distance = 54 * (40/60) = 36 km.
This question belongs to:
Maths
Time Speed and Distance
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