Question

Mariana decides to go running down Strawberry St. in the afternoon to practice for her track relay that is

coming up next week. She has a mass of 59 [kg] and her speed is a steady 6 [m/s] for 30 minutes, then she
takes 2 seconds to slow down her pace to 4 [m/s], which she maintains for another 30 minutes.

Answer 1

Mariana will run a total distance of 18000 meters.

Step-by-step explanation:

Mariana's speed while running can be divided into two parts:

1. She runs at a speed of 6 m/s for 30 minutes.
2. She slows down her pace to 4 m/s in 2 seconds and maintains this speed for another 30 minutes.

To calculate the total distance she runs, we first convert the time to seconds. Then, we can calculate the distance for each part using the formula: distance = speed × time. Finally, we add the distances to find the total distance covered by Mariana.

Let's calculate:

1. Distance in the first part: distance1 = 6 m/s × 30 min × 60 s/min = 10800 m.
2. Distance in the second part: distance2 = 4 m/s × 30 min × 60 s/min = 7200 m.
3. Total distance: total_distance = distance1 + distance2 = 10800 m + 7200 m = 18000 m.

Therefore, Mariana will run a total distance of 18000 meters.