9514 1404 393
Answer:
3.6 m/s
Explanation:
To find Inge's average speed for the race, we need to know her total distance (400 m) and her total time. The times for the 2nd and 3rd portions of the race are given, but we need to figure the time for the first portion. That will be ...
time = distance/speed
time = (150 m)/(4.6 m/s) = 32.609 s . . . . time for first 150 m
Then Inge's average speed is ...
(400 m)/(32.609 s + 40 s + 38 s) = (400 m)/(110.609 s) ≈ 3.6 m/s