A man rows 24 km downstream in 2 hours and the same distance upstream in 6 hours. Find the speed of the stream. MCQ with Answer and Explanation
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Question #1
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An express train covers a distance of 450 km in 5 hours. If a slower local train runs at half the speed of the express train, how much time will the local train take to cover 360 km?
Correct Answer: Option A
Explanation:
Speed of express train = 450 / 5 = 90 km/h. Speed of local train = 90 / 2 = 45 km/h. Time taken by local train = 360 / 45 = 8 hours.
Speed of express train = 450 / 5 = 90 km/h. Speed of local train = 90 / 2 = 45 km/h. Time taken by local train = 360 / 45 = 8 hours.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A cyclist rides from his village to town at 16 km/h and returns at 12 km/h. If the entire journey takes 7 hours, what is the distance from the village to the town?
Correct Answer: Option B
Explanation:
Let distance be d. d/16 + d/12 = 7 => (3d + 4d) / 48 = 7 => 7d / 48 = 7 => d = 48 km.
Let distance be d. d/16 + d/12 = 7 => (3d + 4d) / 48 = 7 => 7d / 48 = 7 => d = 48 km.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A car traveling at 60 km/h covers a certain distance in 4 hours. At what speed must it travel to cover the same distance in 3 hours?
Correct Answer: Option B
Explanation:
Distance = Speed * Time = 60 * 4 = 240 km. Required Speed = Distance / New Time = 240 / 3 = 80 km/h.
Distance = Speed * Time = 60 * 4 = 240 km. Required Speed = Distance / New Time = 240 / 3 = 80 km/h.
This question belongs to:
Maths
Time Speed and Distance
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