Question

9. Bryce drove his car 10 km from his house to Belle Plaine. It took him 8 minutes. He got stopped at a long

traffic light on the return home and so he took 2 minutes longer on the return trip. What was Bryce's average
speed in km per minute? (3 pt)

Answer 1

2 km/minute

Step-by-step explanation:

Here, we are asked to calculate the average speed in km/minute.

As we know that,

Average speed = Total distance ÷ Total time taken

Here,

→ Total distance = 10 km + 10 km

• Because, he first drove 10 km from his house to Belle Plaine and then he again came back to his house.

→ Total distance = 20 km

→ Total time = 8 minutes + 2 minutes

→ Total time = 10 minutes

Substitute the values in the formula of average speed,

→ Average speed = Total distance ÷ Total time taken

→ Average speed = 20km ÷ 10 minutes

→ Average speed = 2 km per minute