Question: Fill in the blank.
Cody and Sarah are in a space rover challenge on Mars. When Cody is 110 m
away from the finish line, Sarah is 350 m from the starting point.
If Cody is 60 m behind Sarah, how long is the course?
The course is _____ m long.
1. **State the problem:** We need to find the total length of the course given the distances of Cody and Sarah from the start and finish line, and the fact that Cody is 60 m behind Sarah.
2. **Define variables:** Let the total length of the course be $$L$$ meters.
3. **Given information:**
- Cody is 110 m from the finish line, so Cody's position from the start is $$L - 110$$.
- Sarah is 350 m from the start.
- Cody is 60 m behind Sarah, so $$L - 110 = 350 - 60$$.
4. **Set up the equation:**
$$L - 110 = 350 - 60$$
5. **Simplify the right side:**
$$L - 110 = 290$$
6. **Solve for $$L$$:**
$$L = 290 + 110$$
$$L = 400$$
7. **Answer:** The course is **400 m** long.