Question

Mrs. Healthy walked along a running track at 2000 m/h. She took 4 min more than Mrs. Wise to walk the entire length of the track once. If the track is 400 m long, Mrs. Wise's average walking speed was ___m/min.

a. 240
b. 160
c. 200
d. 120

Answer 1

Mrs. Wise's average walking speed was 25 m/min.

Step-by-step explanation:

To find Mrs. Wise's average walking speed, we need to calculate the time it took her to walk the track. We know that Mrs. Healthy took 4 minutes longer than Mrs. Wise to walk the track. Let's start by calculating Mrs. Healthy's time:

Time = Distance / Speed = 400 m / 2000 m/h = 0.2 h = 12 min

Now, let's calculate Mrs. Wise's time:

Time = Mrs. Healthy's time + 4 min = 12 min + 4 min = 16 min

To find Mrs. Wise's average walking speed, we divide the distance (400 m) by the time (16 min):

Average walking speed = Distance / Time = 400 m / 16 min = 25 m/min

Therefore, Mrs. Wise's average walking speed was 25 m/min.