🤓 Based on our data, we think this question is relevant for Professor Chand's class at MDC.

This problem asks us to convert the strange speed units of **furlongs per fortnight** to **miles per hour**.

Whenever we convert units, the first step is to figure out what our starting and ending units are. We'll place the *starting units on the left*, an equals sign and *ending units on the right*, and some *conversion factors in the middle*:

$\left(\frac{{s}{t}{a}{r}{t}{i}{n}{g}{}{u}{n}{i}{t}}{{s}{t}{a}{r}{t}{i}{n}{g}{}{u}{n}{i}{t}}\right)\mathbf{\times}(conversionfactor)\mathbf{\times}(conversionfactor)\mathbf{=}\left(\frac{{e}{n}{d}{i}{n}{g}{}{u}{n}{i}{t}}{{e}{n}{d}{i}{n}{g}{}{u}{n}{i}{t}}\right)$

The conversion factors *must* *cancel out* the starting unit and *leave* the ending unit. So to cancel out the **starting unit** in the **numerator**, the first conversion factor must have that **same unit** in the **denominator**.

While driving in an exotic foreign land you see a speed limit sign on a highway that reads 1.81×10^{5} furlongs per fortnight.

How many miles per hour is this? (One furlong is 1/8 mile, and a fortnight is 14 days. A furlong originally referred to the length of a plowed furrow.)

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Units & Conversions concept. If you need more Units & Conversions practice, you can also practice Units & Conversions practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Chand's class at MDC.