Sofía is driving to Texas. She travels at 70 kilometers per hour for 2 hours, and 63 kilometers per hour for 5 hours. Over the 7 hour time period what was Sofía’s average speed?

Sofía is driving to Texas. She travels at 70 kilometers per hour for 2 hours, and 63 kilometers per hour for 5 hours. Over the 7 hour time period what was Sofía’s average speed?

Detailed Explanation

To find the average over the entire trip, use:

Average Speed = Total Distance ÷ Total Time.

Begin by calculating the total distance traveled:

Total Distance = 2(70) + 5(63) = 140 + 315 = 455 km.

While the total time 7 hours.

Substitute these values into the average speed formula to solve:

Average Speed = 455 ÷ 7 = 65 km/h.

Average Speed = Total Distance ÷ Total Time.

Begin by calculating the total distance traveled:

Total Distance = 2(70) + 5(63) = 140 + 315 = 455 km.

While the total time 7 hours.

Substitute these values into the average speed formula to solve:

Average Speed = 455 ÷ 7 = 65 km/h.