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A car covers the first 30 km of its journey in 45 minutes and the remaining 25 km in 30 minutes. What is the average speed of the car?
- a)60
- b)64
- c)49
- d)48
- e)None of these
Correct answer is option 'E'. Can you explain this answer?
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Verified Answer
A car covers the first 30 km of its journey in 45 minutes and the rema...
Total distance/Total time =(30+25)/[(3/4)+(1/2)]
Average Speed=44kmph
Most Upvoted Answer
A car covers the first 30 km of its journey in 45 minutes and the rema...
The average speed of a car can be calculated by dividing the total distance traveled by the total time taken. In this case, the car covers the first 30 km in 45 minutes and the remaining 25 km in 30 minutes. To find the average speed, we need to calculate the total distance and the total time taken.
Calculating the total distance:
The car covers the first 30 km and then an additional 25 km. So, the total distance covered is 30 km + 25 km = 55 km.
Calculating the total time taken:
The car takes 45 minutes to cover the first 30 km and then an additional 30 minutes to cover the remaining 25 km. So, the total time taken is 45 minutes + 30 minutes = 75 minutes.
Calculating the average speed:
To calculate the average speed, we need to convert the total time taken from minutes to hours since speed is usually measured in km/h. There are 60 minutes in an hour, so the total time taken is 75 minutes / 60 = 1.25 hours.
Now, we can calculate the average speed by dividing the total distance (55 km) by the total time taken (1.25 hours):
Average speed = 55 km / 1.25 hours = 44 km/h
However, none of the given options match the calculated average speed of 44 km/h. Therefore, the correct answer is "None of these" (option E).
Calculating the total distance:
The car covers the first 30 km and then an additional 25 km. So, the total distance covered is 30 km + 25 km = 55 km.
Calculating the total time taken:
The car takes 45 minutes to cover the first 30 km and then an additional 30 minutes to cover the remaining 25 km. So, the total time taken is 45 minutes + 30 minutes = 75 minutes.
Calculating the average speed:
To calculate the average speed, we need to convert the total time taken from minutes to hours since speed is usually measured in km/h. There are 60 minutes in an hour, so the total time taken is 75 minutes / 60 = 1.25 hours.
Now, we can calculate the average speed by dividing the total distance (55 km) by the total time taken (1.25 hours):
Average speed = 55 km / 1.25 hours = 44 km/h
However, none of the given options match the calculated average speed of 44 km/h. Therefore, the correct answer is "None of these" (option E).
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A car covers the first 30 km of its journey in 45 minutes and the remaining 25 km in 30 minutes. What is the average speed of the car?a)60b)64c)49d)48e)None of theseCorrect answer is option 'E'. Can you explain this answer?
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