Question 9 of 10

Question

A rhino can run at speeds of about 28 miles per hour. What is that speed in feet per second, to the nearest whole number? (Remember, there are 5280 feet in a mile, 60 seconds in a minute, and 60 minutes in an hour.)
Calendar
Inbox
History.
080
Mastery
Studio
Help
• A. 88 feet per second
B. 41 feet per second
C. 36 feet per second
D. 189 feet per second

Answer 1

To convert the speed of the rhino from miles per hour to feet per second, we can use the following conversions:

1 mile = 5280 feet
1 hour = 3600 seconds

First, we can set up the conversion from miles per hour to feet per second:

$$\text{Speed in feet per second}=\text{Speed in miles per hour}\times \left(\frac{5280\text{ feet}}{1\text{ mile}}\right)\times \left(\frac{1\text{ hour}}{3600\text{ seconds}}\right)$$

Now, substituting the speed of the rhino (28 miles per hour):

$$\text{Speed in feet per second}=28,\text{miles per hour}\times \frac{5280,\text{feet}}{1,\text{mile}}\times \frac{1,\text{hour}}{3600,\text{seconds}}$$

Calculating this step by step:

1. Multiplying miles by feet: $$28\times 5280=147840,\text{feet per hour}$$

2. Now, converting feet per hour to feet per second: $$\frac{147840,\text{feet}}{3600,\text{seconds}}\approx 41.2,\text{feet per second}$$

Rounding this to the nearest whole number gives us approximately 41 feet per second.

Thus, the answer is:

B. 41 feet per second