A car travels a distance of 240 km at a certain speed. If the speed is increased by 10 km/h, it takes 4 hours for the journey. Find the original speed. MCQ with Answer and Explanation
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Question #1
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A high-speed train travels at 162 km/h. How many meters does it cover in exactly 8 seconds?
Correct Answer: Option C
Explanation:
Speed in m/s = 162 * (5/18) = 9 * 5 = 45 m/s. Distance covered in 8 seconds = 45 * 8 = 360 meters.
Speed in m/s = 162 * (5/18) = 9 * 5 = 45 m/s. Distance covered in 8 seconds = 45 * 8 = 360 meters.
This question belongs to:
Maths
Time Speed and Distance
Question #2
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A train 180 meters long is running at a speed of 90 km/h. How long will it take to pass a post?
Correct Answer: Option C
Explanation:
Speed = 90 * (5/18) = 25 m/s. Time to pass a post = 180 / 25 = 7.2 seconds.
Speed = 90 * (5/18) = 25 m/s. Time to pass a post = 180 / 25 = 7.2 seconds.
This question belongs to:
Maths
Time Speed and Distance
Question #3
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The speed of two runners are in the ratio 3 : 5. If the first runner takes 40 seconds to complete a loop, how much time does the second runner take?
Correct Answer: Option D
Explanation:
Ratio of speeds = 3:5, so ratio of times taken = 5:3. Given 5 parts = 40 seconds => 1 part = 8 seconds. Time taken by the second runner = 3 parts = 3 * 8 = 24 seconds.
Ratio of speeds = 3:5, so ratio of times taken = 5:3. Given 5 parts = 40 seconds => 1 part = 8 seconds. Time taken by the second runner = 3 parts = 3 * 8 = 24 seconds.
This question belongs to:
Maths
Time Speed and Distance
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