A runner covers a circular path of radius 70 meters in 44 seconds. What is his speed in km/h? MCQ with Answer and Explanation
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Question #1
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A man rows downstream 48 km in 4 hours and upstream 24 km in 4 hours. Find the speed of the boat in still water.
Correct Answer: Option A
Explanation:
Downstream speed = 48 / 4 = 12 km/h. Upstream speed = 24 / 4 = 6 km/h. Speed in still water = (Downstream speed + Upstream speed) / 2 = (12 + 6) / 2 = 9 km/h.
Downstream speed = 48 / 4 = 12 km/h. Upstream speed = 24 / 4 = 6 km/h. Speed in still water = (Downstream speed + Upstream speed) / 2 = (12 + 6) / 2 = 9 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A field clerk walking at 5 km/h handles a regular sector. If he steps up to run at 10 km/h, he takes 24 minutes less across the course stretch. Find the absolute distance profile.
Correct Answer: Option C
Explanation:
Time difference = 24 minutes = 24/60 = 2/5 hours. Let distance be d. d / 5 - d / 10 = 2/5 => d / 10 = 2/5 => d = 4 km.
Time difference = 24 minutes = 24/60 = 2/5 hours. Let distance be d. d / 5 - d / 10 = 2/5 => d / 10 = 2/5 => d = 4 km.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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A passenger train running at 54 km/h passes through a tunnel 400 meters long in 40 seconds. Find the length of the train.
Correct Answer: Option B
Explanation:
Speed of train = 54 * (5/18) = 15 m/s. Total distance covered in 40 seconds = 15 * 40 = 600 meters. Length of train = Total distance - Tunnel length = 600 - 400 = 200 meters.
Speed of train = 54 * (5/18) = 15 m/s. Total distance covered in 40 seconds = 15 * 40 = 600 meters. Length of train = Total distance - Tunnel length = 600 - 400 = 200 meters.
This question belongs to:
Maths
Time Speed and Distance
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