1. ## Ratios

How do I convert 65 miles per hour to feet per second?

2. $\frac{65 \, miles}{hour} \cdot \frac{5280 \, ft}{mile} \cdot \frac{1 \, hour}{3600 \, sec} =$

or, you can remember the fact that 60 mph = 88 ft/sec and use a ratio ...

$\frac{x}{65} = \frac{88}{60}$

3. Thanks alot! I should have put that I already knew those steps. I'm looking at the steps and have no clue how to do the next part. That's what's confusing me.

4. Anyone?

Also I'm trying to convert 45 seconds to 30 minutes as a fraction in simplest form. Would I make 30 minutes into seconds like 30 minutes equals 1800 seconds, so the ration to change to a fraction would be 45/1800?

5. Anyone?

Anyone?

Also I'm trying to convert 45 seconds to 30 minutes as a fraction in simplest form. Would I make 30 minutes into seconds like 30 minutes equals 1800 seconds, so the ration to change to a fraction would be 45/1800?
$1$ minute has $60$ seconds
so $30$ minutes has $30 \times 60 = 1800$ seconds.

So the ratio is - $45:1800$

Both are divisible by $45$ hence divide both sides by $45$ to get the ratio in it simplest form.

EDIT: Create new thread for new question because some people might not check thread thinking it is answered. So, rather than waiting, create a new thread (It's also a forum rule #15: Rules).

7. I will do that Air. Thanks alot. And thanks for telling me a forum rule, otherwise I would have missed it.

Air, would I do the same thing for the first question? I'm still stuck on that one.

I will do that Air. Thanks alot. And thanks for telling me a forum rule, otherwise I would have missed it.

Air, would I do the same thing for the first question? I'm still stuck on that one.
Originally Posted by skeeter
$\frac{65 \, miles}{hour} \cdot \frac{5280 \, ft}{mile} \cdot \frac{1 \, hour}{3600 \, sec} =$

or, you can remember the fact that 60 mph = 88 ft/sec and use a ratio ...

$\frac{x}{65} = \frac{88}{60}$

$1$ mph = $\frac{88}{60}$ ft/sec

so $65$ mph will be:

$1 \times 65$ mph $= \frac{88}{60} \times 65$ ft/second.

9. My question is this. I want to understand how I would have gotten 88/60. Did I divide something? And did that something have to do with 1 mile equaling 5280 feet, and 3600 in one hour?

My question is this. I want to understand how I would have gotten 88/60. Did I divide something? And did that something have to do with 1 mile equaling 5280 feet, and 3600 in one hour?
$1$ mile equals $5280$ feet
$1$ hour equals $3600$ seconds

So when we have $1$ mile per hour, This is the same as:

$5280$ feet per $3600$ seconds

But as we want ft/sec, so for $1$ second, we divide the value by 3600 so we get:

$\frac{5280}{3600}$ ft/sec which simplifies to $\frac{88}{60}$ ft/sec

So, by this:

$1$ mph = $\frac{88}{60}$ ft/sec

11. Why do you have 5250 instead of 5280?

Why do you have 5250 instead of 5280?

Oops, it's a typo. I've corrected it.

It is 5280, not 5250.

13. Oh,lol I'm sorry to be asking so many questions, but I want to know exactly what I'm doing and the steps that I am taking. Is 88/60 5280/3600 simplified?

Oh,lol I'm sorry to be asking so many questions, but I want to know exactly what I'm doing and the steps that I am taking. Is 88/60 5280/3600 simplified?
Yes, divide the numerator and the denominator of this fraction $\left(\frac{5280}{3600}\right)$ by 60.

15. Sorry, another question. Why by 60?

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