The diagram shows the speed-time graph of a car. After 10 seconds, how far has the car travelled?

To determine how far the car has traveled after 10 seconds using a speed-time graph, follow these steps:

1. Break Down the Problem

1. Identify the area under the speed-time graph for the first 10 seconds.
2. The distance traveled is equal to the area under the speed-time graph.

2. Relevant Concepts

• The area under a speed-time graph represents distance.
• For a graph with constant speed, the area can be calculated as the area of a rectangle or a trapezoid, depending on the shape of the graph.

3. Analysis and Detail

• If the speed is constant over the 10 seconds, calculate the area as: $\text{Distance} = \text{Speed} \times \text{Time}$
• If the speed changes, split the area into geometric shapes. For example:
  • Rectangles for constant speed.
  • Triangles for speed increases or decreases.

4. Verify and Summarize

• Check calculations based on the shapes identified.
• Sum all areas for the total distance.

Final Answer

Without the actual graph, I cannot provide the numerical value. However, apply the steps above to calculate the distance based on the graph's characteristics, using appropriate geometric area formulas.