# Question #14004

Jan 19, 2018

$2 \frac{1}{2}$miles in half an hour and $12 \frac{1}{2}$miles in $2 \frac{1}{2}$ hours

#### Explanation:

Malia runs 5 miles in 1 hour.

So, she must be running $5$ x $\frac{1}{2}$ miles in $\frac{1}{2}$ an hour.
that's $5$ x $\frac{1}{2}$ miles
$2 \frac{1}{2}$miles

and also, she must be running $5$ x $2 \frac{1}{2}$ miles in $2 \frac{1}{2}$ hours
that's $5$ x $\frac{5}{2}$ miles
$= \frac{25}{2}$ miles
$= 12 \frac{1}{2}$miles :)

-Sahar.

Jan 19, 2018

See below

#### Explanation:

Use the unitary method

Distance covered in 1 hour= 5 miles
Distance covered in $\frac{1}{2}$ hour= $\frac{5}{2}$
= 2.5 miles
Distance covered in 2$\frac{1}{2}$ hours = $5 \cdot 2 \frac{1}{2}$
= $5 \cdot \frac{5}{2}$
= $\frac{25}{2}$
= 12.5 miles