Question

a person runs 3 miles in 40 min. what is the speed in mph?

Explanation:

Step1: Recall speed formula

Speed \( v = \frac{\text{distance}}{\text{time}} \). Distance is 3 miles, time is 40 minutes. Convert minutes to hours: 40 min \( = \frac{40}{60} = \frac{2}{3} \) hours.

Step2: Calculate speed

Substitute into formula: \( v = \frac{3}{\frac{2}{3}} = 3 \times \frac{3}{2} = \frac{9}{2} = 4.5 \) mph.

Answer:

The speed is 4.5 mph.