Question

1. sally drove at a speed of 50 km/hr. south for 2 hours. how far did she travel? 14. a hiker walked a 5 kilometer trail in 65 minutes. what was his speed?

Explanation:

Step1: Recall distance formula

Distance = Speed × Time

Step2: Calculate Sally's distance

$d = 50\ \text{km/hr} \times 2\ \text{hr} = 100\ \text{km}$

Step3: Convert time to hours

$\text{Time} = \frac{65}{60}\ \text{hr} = \frac{13}{12}\ \text{hr}$

Step4: Calculate hiker's speed

$S = \frac{\text{Distance}}{\text{Time}} = \frac{5\ \text{km}}{\frac{13}{12}\ \text{hr}} = 5 \times \frac{12}{13} \approx 4.62\ \text{km/hr}$

Answer:

1. Sally traveled 100 kilometers.
2. The hiker's speed is approximately 4.62 km/hr (or exactly $\frac{60}{13}$ km/hr).