Question

it takes Sarah 50 minutes to walk to her friends house 1 3/4 miles away. What is her walking pace in miles per hour?

Answer 1

Sarah's speed is $\frac{ 1\frac{3}{4} miles}{50 mins}$

Is the same as, $\frac{ \frac{7}{4} mile}{50 mins}$

We need to find her speed in miles/hr.
We have her speed in miles/min.

So, we have to convert the 50 mins to hour.

1 minute = $\frac{1}{60}$ hour
∴ 50 minute = $50* \frac{1}{60}$ hours
                
= $50* \frac{1}{60}$ hours

= $\frac{50}{60}$ hours

= $\frac{5}{6}$ hours

So, Sarah's speed in miles per hour is - $\frac{\frac{7}{4} miles}{ \frac{5}{6} hrs}$.

Also, as $\frac{7}{4}$ is equal to 1.75.

And, as $\frac{5}{6}$ is equal to 0.83.

So, Sarah's speed can also be expressed as $\frac{1.75 miles}{0.83 hrs}$

Answer 2

50 minutes= 5/6 hr

(1 3/4 miles)/ (5/6 hr)= 2.1 miles/hr

Hope this would help~