Question

A friend tells you that he can run three miles in half an hour. You want to calculate his speed in miles per hour. The ratio is: 3miles------------1---2 hours converts this ratio to a unit cup

Answer 1

Given:

The ratio of speed is given as.

$\frac{3\text{ mies}}{\frac{1}{2}\text{ hours}}$

The objective is to convert the ratio into unit ratio.

The unit ratio can be calculated by multiplying 2 on numerator and denominator, so that the denominator will become one.

$\begin{gathered} \frac{3\times2\text{ miles}}{\frac{1}{2}\times2\text{ hour}} \\ \frac{6\text{ miles}}{1\text{ hour}}\text{ } \\ 6\text{ miles/hour} \end{gathered}$

Hence, the unit ratio is 6 miles/hour.