Question

A pronghorn antelope can run at speeds of about 59 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.)

Answer 1

The antelope can travel at a speed of (rounding to) 87 feet per second.

Answer 2

`87 (feet)/(s)`

Explanation:

We know that there are 5280 feet in a mile, 60 seconds in a minute, and 60 minutes in an hour.

To know what the speed of the antelope will be in feet per second we will use a conversion factor.

`(59 miles)/(1h) .(5280 feet)/(1 mile)= 311520 (feet)/(h)`

We know that one hour has 60 minutes and that one minute has 60 seconds. We use a simple rule of three to know how many seconds are in an hour

`1min \longrightarrow 60s\\ 60 min\longrightarrow x\\ x= ((60)(60))/(1)= 3600`

`311520(feet)/(h).(1h)/(3600s)= 87 (feet)/(s)`

the speed of the antilope is
`87 (feet)/(s)`