Question

A red horse and a black horse raced on a 1-mile-long circular racetrack. The red horse completed the race in 120 seconds, and the black horse completed the race in 150 seconds. Which choice correctly describes the speed of the horses?

Answer 1

Answer: The speed of red horse = 44 feet per second and the speed of black horse = 35.2 feet per second.

Step-by-step explanation:

Given: A red horse and a black horse raced on a 1-mile-long circular racetrack.

Time taken by red horse = 120 seconds

Time taken by black horse = 150 seconds

Speed = $\dfrac{Distance}{Time}$

So, speed of red horse =$\dfrac{1}{120}\text{ mile per second}$

Since 1 mile = 5280 feet

Speed of red horse = $\dfrac{5280}{120} =44\text{ feet per second}$

Similarly,

Speed of black horse = $\dfrac{5280}{150} =35.2\text{ feet per second}$

Hence, the speed of red horse = 44 feet per second and the speed of black horse = 35.2 feet per second.