Question

Sally decided to walk to her friend Amanda's house which is 2 km away from

her house. She walked for 15 minutes. Then she saw her friend Tori and
talked to her for 10 minutes before she continued to Amanda's house. The
remainder of the walk took 10 minutes. What was her average speed?

Answer 1

Sally's average speed to Amanda's house was approximately 3.43 km/h, calculated by dividing the total distance of 2 km by the total time of 0.583 hours (35 minutes).

Step-by-step explanation:

To calculate Sally's average speed for her walk to Amanda's house, we first need to determine the total time taken for the journey. Sally walked for 15 minutes, talked for 10 minutes, and then walked another 10 minutes, which sums up to a total of 35 minutes. Note that the time spent talking does not count towards the walking time, but it does count towards the total time from the start to the end of the trip when calculating average speed.

Now, we convert 35 minutes to hours to find the average speed in km/h. 35 minutes is equal to 35/60 hours, which is approximately 0.583 hours. Since the total distance to Amanda's house is 2 km, we can now calculate the average speed using the formula:

Average speed = Total distance / Total time

Average speed = 2 km / 0.583 hours ≈ 3.43 km/h

So, Sally's average speed to Amanda's house was approximately 3.43 km/h.