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A car travels 120 km in 2 hours and then 60 km in 1 hour. What is its average speed ?
- a)60 km/h
- b)80 km/h
- c)50 km/h
- d)40 km/h
Correct answer is option 'A'. Can you explain this answer?
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A car travels 120 km in 2 hours and then 60 km in 1 hour. What is its ...
Topic in NCERT: Speed
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A car travels 120 km in 2 hours and then 60 km in 1 hour. What is its ...
Understanding Average Speed
To calculate the average speed of the car, we need to consider the total distance traveled and the total time taken.
Total Distance Traveled
- The car travels 120 km in the first part of the journey.
- In the second part, it travels 60 km.
- Therefore, the total distance is:
- Total Distance = 120 km + 60 km = 180 km
Total Time Taken
- The car takes 2 hours for the first segment.
- It takes 1 hour for the second segment.
- Thus, the total time is:
- Total Time = 2 hours + 1 hour = 3 hours
Calculating Average Speed
- Average speed is calculated using the formula:
- Average Speed = Total Distance / Total Time
- Plugging in the values we found:
- Average Speed = 180 km / 3 hours = 60 km/h
Conclusion
- The average speed of the car over the entire journey is 60 km/h.
- Therefore, the correct answer is option 'A'.
This method of calculating average speed can be applied to various other scenarios involving distance and time, making it an essential concept in understanding motion.
To calculate the average speed of the car, we need to consider the total distance traveled and the total time taken.
Total Distance Traveled
- The car travels 120 km in the first part of the journey.
- In the second part, it travels 60 km.
- Therefore, the total distance is:
- Total Distance = 120 km + 60 km = 180 km
Total Time Taken
- The car takes 2 hours for the first segment.
- It takes 1 hour for the second segment.
- Thus, the total time is:
- Total Time = 2 hours + 1 hour = 3 hours
Calculating Average Speed
- Average speed is calculated using the formula:
- Average Speed = Total Distance / Total Time
- Plugging in the values we found:
- Average Speed = 180 km / 3 hours = 60 km/h
Conclusion
- The average speed of the car over the entire journey is 60 km/h.
- Therefore, the correct answer is option 'A'.
This method of calculating average speed can be applied to various other scenarios involving distance and time, making it an essential concept in understanding motion.
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A car travels 120 km in 2 hours and then 60 km in 1 hour. What is its average speed ?a)60 km/hb)80 km/hc)50 km/hd)40 km/hCorrect answer is option 'A'. Can you explain this answer? for Class 7 2025 is part of Class 7 preparation. The Question and answers have been prepared according to the Class 7 exam syllabus. Information about A car travels 120 km in 2 hours and then 60 km in 1 hour. What is its average speed ?a)60 km/hb)80 km/hc)50 km/hd)40 km/hCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 7 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A car travels 120 km in 2 hours and then 60 km in 1 hour. What is its average speed ?a)60 km/hb)80 km/hc)50 km/hd)40 km/hCorrect answer is option 'A'. Can you explain this answer?.
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