Question

1. the speed of a cheetah running 300 yards in 10 seconds is: *

a. 30 yards per second.
b. 3,000 yards per minute.
c. 30,000 miles per hour.
d. none of the above

Explanation:

Step1: Recall speed formula

Speed = $\frac{distance}{time}$

Step2: Calculate speed in yards per second

Given distance = 300 yards and time = 10 seconds. So speed = $\frac{300}{10}=30$ yards per second.

Step3: Convert to yards per minute

Since 1 minute = 60 seconds, and speed is 30 yards per second, then speed in yards per minute is $30\times60 = 1800$ yards per minute.

Step4: Convert to miles per hour

1 mile = 1760 yards, 1 hour = 3600 seconds. First, speed in yards per second is 30 yards per second. In yards per hour, it is $30\times3600=108000$ yards per hour. Then in miles per hour, it is $\frac{108000}{1760}\approx61.36$ miles per hour.

Answer:

A. 30 yards per second