A boat moves upstream at 9 km/h and downstream at 15 km/h. Find the speed of the boat in still water. MCQ with Answer and Explanation
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Question #1
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A person row a boat 24 km upstream in 4 hours. If the speed of the current is 2 km/h, find the speed of the boat in still water.
Correct Answer: Option D
Explanation:
Upstream speed = 24 / 4 = 6 km/h. Upstream Speed = Speed in still water - Current speed => 6 = Speed in still water - 2 => Speed in still water = 8 km/h.
Upstream speed = 24 / 4 = 6 km/h. Upstream Speed = Speed in still water - Current speed => 6 = Speed in still water - 2 => Speed in still water = 8 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A train 160 meters long crosses a pole in 8 seconds. What is its speed in km/h?
Correct Answer: Option C
Explanation:
Speed of train = 160 / 8 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.
Speed of train = 160 / 8 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A hound pursues a fox that is initially 150 meters ahead. The fox flies at 30 km/h and the hound targets at 36 km/h. Find the total distance the fox runs before capture.
Correct Answer: Option A
Explanation:
Relative speed = 36 - 30 = 6 km/h = 5/3 m/s. Time required for capture = 150 / (5/3) = 90 seconds. Distance run by fox = Speed * Time = [30 * (5/18)] * 90 = (25/3) * 90 = 750 meters.
Relative speed = 36 - 30 = 6 km/h = 5/3 m/s. Time required for capture = 150 / (5/3) = 90 seconds. Distance run by fox = Speed * Time = [30 * (5/18)] * 90 = (25/3) * 90 = 750 meters.
This question belongs to:
Maths
Time Speed and Distance
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