A cyclist handles 800 meters in exactly 2 minutes 40 seconds. Find his speed in km/h. MCQ with Answer and Explanation
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Question #1
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A car covers a total distance of 180 km. It travels the first half of the distance at 30 km/h and the second half at 60 km/h. Find the average speed for the full journey.
Correct Answer: Option A
Explanation:
Average Speed = 2xy / (x + y) = (2 * 30 * 60) / (30 + 60) = 3600 / 90 = 40 km/h.
Average Speed = 2xy / (x + y) = (2 * 30 * 60) / (30 + 60) = 3600 / 90 = 40 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A passenger coach locomotive 120 meters long passes a clear roadside post marker in 6 seconds flat. Find the time needed to cross an extensions platform 240 meters long.
Correct Answer: Option A
Explanation:
Speed of coach locomotive = 120 / 6 = 20 m/s. Total distance to clear platform stretch = 120 + 240 = 360 meters. Time required = 360 / 20 = 18 seconds.
Speed of coach locomotive = 120 / 6 = 20 m/s. Total distance to clear platform stretch = 120 + 240 = 360 meters. Time required = 360 / 20 = 18 seconds.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A boatman rows 15 km downstream in 3 hours and 12 km upstream in 4 hours. What is the speed of the boat in still water?
Correct Answer: Option C
Explanation:
Downstream speed = 15 / 3 = 5 km/h. Upstream speed = 12 / 4 = 3 km/h. Speed in still water = (5 + 3) / 2 = 4 km/h.
Downstream speed = 15 / 3 = 5 km/h. Upstream speed = 12 / 4 = 3 km/h. Speed in still water = (5 + 3) / 2 = 4 km/h.
This question belongs to:
Maths
Time Speed and Distance
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