Respuesta :
Answer:
3 hours and 28 minutes.
Explanation:
Average speed is gu=iven by,
Average speed = [tex]\frac{Total distance}{Total time}[/tex]
∴ Total distance = Average speed × Total time
Average speed = 105 [tex]\frac{km}{h}[/tex]
Total time = 2 hour and 20 minutes = 2.33 hour
Total distance = 105 × 2.33
Total distance = 244.65 km
The total distance between San Diego and Los Angeles is 244.65 km.
Due to heavy traffic the average speed is decreased to 70 [tex]\frac{km}{h}[/tex].
Average speed = [tex]\frac{Total distance}{Total time}[/tex]
∴ Total time = [tex]\frac{Total distance}{Average speed }[/tex]
Total time = [tex]\frac{244.65}{70}[/tex]
Total time = 3.495 hours
Total time = 3 hours and 28 minutes
Thus due to heavy traffic the time taken to travel from between San Diego and Los Angeles is 3 hours and 28 minutes.
Answer:
Given the second case mentioned, the trip will take:
- 1 hour and 10 minutes more than in the first case, that is, it will take 3 hours with 30 minutes in total.
Explanation:
To calculate how much longer someone will take on that journey, you must calculate the distance traveled, using the aforementioned initial speed, however, the time must be converted into a number that you can calculate, this is done using a rule of three:
- 60 minutes = 1
- 20 minutes = X
- X = 20 minutes / 60 minutes = 0.33333
Now it is calculated:
- Kilometers traveled = 105 km / h (speed used) * 2,333 hours (the change from 2 hours and twenty minutes to a number) = 245 km
Now you just need to divide the total distance by the new speed to find the total time spent now:
- Total time case 2 = 245 Km / 70 Km / h = 3.5 hours (which is equal to 3 hours and 30 minutes)
Since the time of the first case was 2 hours 20 minutes, the difference is 1 hour 10 minutes.
