Question

Molly jogged at a rate of 6 miles per hour. What was her speed in feet per second?

Answer 1

Hello there!

Speed = distance / time

To do this, convert:

miles --> feet

hour --> seconds

After you get your answers, plug them into the equation above, and you'll get your answer!

( I get that a previous user already answered, but I just wanted to throw in my two cents). :)

Hope this helped!

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Answer 2

To solve this problem, you need to set up a proportion. If she jogs 6 miles per hour, then this can be written as $\frac{6(miles)}{1(hr)}$. If there are 5280 feet in a single mile, then first we multiply the two proportions like this:

$\frac{6(miles)}{1(hr)} * \frac{5280(ft)}{1(mile)}$

The two 'mile' values cancel each other out, so then just multiply $\frac{6*5280(feet)}{1(hour)}$. This equals to 31680 feet per hour. Now let's  convert to seconds.

$\frac{360(seconds)}{1(hour)}$, or 360 seconds every hour. Since hours are much longer than seconds, multiply 31680 by the reciprocal of 360, so that it makes sense.

$31680 * \frac{1}{360}$

She runs 88 feet per second.