Question

1. kristin runs from 3.50 pm to 4.20 pm at an average speed of 7 kilometres per hour. how far did she run?

Explanation:

Step1: Calculate the time duration

Kristin runs from 3:50 pm to 4:20 pm. The time duration is \( 4\colon20 - 3\colon50 = 30 \) minutes. Since 1 hour = 60 minutes, convert 30 minutes to hours: \( \frac{30}{60} = 0.5 \) hours.

Step2: Use the formula \( \text{Distance} = \text{Speed} \times \text{Time} \)

Given speed \( v = 7 \) km/h and time \( t = 0.5 \) h. Substitute into the formula: \( \text{Distance} = 7 \times 0.5 = 3.5 \) kilometres.

Answer:

3.5 kilometres