Questions and Answers
How many seconds will it take for a train traveling at 45 km/hr to cover a distance of 0.8 km?
At what speed must an aeroplane travel to cover a distance that is typically traversed in 5 hours at 240 km/hr in 1 2/3 hours?
If a train covers 4/5 km in 36 seconds, what is its speed in km/hr?
How long will it take for a train going 45 km/hr to cover a distance of 0.5 km?
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If the speed of an aeroplane is increased from 240 km/hr to 600 km/hr, how much less time will it take to cover the same distance?
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Study Notes
Distance, Speed, and Time Calculations
- A train traveling at 45 km/h needs to cover a distance of 4/5 km.
- Time taken in seconds can be calculated using the formula: Time = Distance / Speed.
- Convert speed from km/h to km/s: 45 km/h = 45/3600 km/s.
- Calculate time for distance of 4/5 km: Time = (4/5) / (45/3600) yields 36 seconds.
- The train will take 36 seconds to cover the distance.
Aeroplane Speed Requirements
- An aeroplane travels a distance at a speed of 240 km/h for 5 hours.
- Total distance covered can be calculated: Distance = Speed × Time = 240 km/h × 5 h = 1200 km.
- To find the speed required to cover the same distance in 1 2/3 hours (or 5/3 hours), use the formula: Speed = Distance / Time.
- Speed needed: 1200 km / (5/3 h) = 1200 km × (3/5) = 720 km/h.
- Incorrect options for the speed required include 300 km/h, 360 km/h, and 600 km/h; correct speed is 720 km/h.
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Description
Test your knowledge on speed and distance calculations with this quiz. Solve problems involving trains and airplanes, focusing on how speed affects travel time. Perfect for students practicing physics concepts related to motion.
