A person runs around a square track of side 60 meters. If his speed is 12 km/h, how much time does he take to complete one round? MCQ with Answer and Explanation
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Question #1
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A boat rowed downstream covers 40 km in 4 hours and manages 20 km upstream in 4 hours. Find the baseline speed of the boat in still water.
Correct Answer: Option D
Explanation:
Downstream speed = 40 / 4 = 10 km/h. Upstream speed = 20 / 4 = 5 km/h. Speed in still water = (10 + 5) / 2 = 7.5 km/h.
Downstream speed = 40 / 4 = 10 km/h. Upstream speed = 20 / 4 = 5 km/h. Speed in still water = (10 + 5) / 2 = 7.5 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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Two cars A and B leave an intersection simultaneously at right angles. A travels North at 60 km/h and B travels East at 80 km/h. Find the direct distance between them after 30 minutes.
Correct Answer: Option A
Explanation:
Time = 30 minutes = 0.5 hours. Distance covered by A = 60 * 0.5 = 30 km. Distance covered by B = 80 * 0.5 = 40 km. Distance between them = sqrt(30^2 + 40^2) = sqrt(900 + 1600) = sqrt(2500) = 50 km.
Time = 30 minutes = 0.5 hours. Distance covered by A = 60 * 0.5 = 30 km. Distance covered by B = 80 * 0.5 = 40 km. Distance between them = sqrt(30^2 + 40^2) = sqrt(900 + 1600) = sqrt(2500) = 50 km.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A cargo container vehicle spans 600 meters in exactly 40 seconds. Find its baseline speed index in km/h.
Correct Answer: Option B
Explanation:
Speed = 600 / 40 = 15 m/s. In km/h index = 15 * (18/5) = 54 km/h.
Speed = 600 / 40 = 15 m/s. In km/h index = 15 * (18/5) = 54 km/h.
This question belongs to:
Maths
Time Speed and Distance
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