Answer:
57.1428571429 miles per hour Round off the answer to what your teacher asked.
Step-by-step explanation:
Since we want final answer in miles per hour, lets change the 30 mins to 0.5 hours
Phase 1 =25miles per 0.5 hours
Phase 2 = (200miles-25miles) per 3 hours
Speed = distance/time
Average speed = total distance/ time
Total distance is 200miles because both phases say from new york that means it travels 25 miles away from new york then 3 hours later it is 200 miles away from new york
total time =3 hours+0.5 hours = 3.5 hours
Average speed = 200/3.5
Average speed = 57.1428571429 miles per hour
Rate brainliest please
We want to get the average speed between the 30 minute and 3-hour time frame.
The average speed in that time frame is 70 miles per hour.
We will define average speed as the quotient between the distance travelled and the time it takes to travel that distance.
We know that at 30 minutes, the car is 25 miles away from NY
At 3 hours, the car is 200 miles away from NY.
So the distance travelled in that time frame is:
200 miles - 25 miles = 175 miles.
And the time between 30 minutes and 3 hours is just:
3 h - 0.5h = 2.5 h
So the average speed is:
S = (175 mi)/(2.5 h) = 70 mi/h
The average speed is 70 miles per hour.
If you want to learn more, you can read:
https://brainly.com/question/9834403
