peter and wendy both run a 400 metre race peter runs at an average speed of 8m/s and Wendy runs at an average speed of 6.35 m/s peter wins the race after peter finishes how many more seconds will pass Wendy finishes?

To determine the time difference between Peter and Wendy finishing the race, we can start by calculating the time each of them takes to complete the 400-meter distance and then find the difference.

### Step 1: Calculate Peter's Time
Peter’s speed is \(8 \, \text{m/s}\).

\[
\text{Time for Peter} = \frac{\text{Distance}}{\text{Speed}} = \frac{400}{8} = 50 \, \text{seconds}
\]

### Step 2: Calculate Wendy's Time
Wendy’s speed is \(6.35 \, \text{m/s}\).

\[
\text{Time for Wendy} = \frac{\text{Distance}}{\text{Speed}} = \frac{400}{6.35} \approx 63.0 \, \text{seconds}
\]

### Step 3: Calculate the Time Difference
Now, subtract Peter's time from Wendy's time to get the delay.

\[
\text{Time Difference} = 63.0 - 50 = 13.0 \, \text{seconds}
\]

### Answer:
Wendy will finish the race **13 seconds** after Peter.

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Would you like a more detailed breakdown or have any questions?

Here are 5 related questions:
1. How would the result change if Wendy's speed was increased to 7 m/s?
2. What distance would they need to run for Wendy to finish exactly 10 seconds after Peter?
3. If Peter slowed down to 7 m/s, what would the new time difference be?
4. How long would it take Wendy to run 800 meters at her current speed?
5. If Wendy’s speed increased by 10%, how many seconds would she finish after Peter?

**Tip:** To compare times over any distance, divide the distance by each runner's speed to find individual times and then take the difference.

Peter and Wendy both run a 400-metre race. Peter runs at an average speed of 8 m/s, and Wendy runs at an average speed of 6.35 m/s. Peter wins the race. After Peter finishes, how many more seconds will pass before Wendy finishes?

Explore how to calculate the time difference between two runners in a 400-metre race where Peter runs at 8 m/s and Wendy at 6.35 m/s. Learn step-by-step how to find each runner’s time and the time delay. This solution is ideal for students in Grades 5-7.

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