Question

A cross country runner Covers 2.5 miles in 12.5 minutes what is the runners average speed in miles per hour

Answer 1

I believe the answer is 5 because if however many times you can multiply 2.5 into 12.5, you get the answer of 5.

Answer 2

Answer:

The average speed of the runner is 12 miles per hour.

Step-by-step explanation:

Given:

A cross country runner Covers =2.5 miles

Time Taken = 12.5 minutes  

To Find:

The runners average speed in miles per hour=?

Solution:

Now, we know that,

Distance = speed x time

Then, 2.5 miles = average speed x 12.5 minutes  

=>$\frac{5}{2} miles = \text{{average speed}} \times  \frac{25}{2} minutes$

=>$\frac{5}{2} miles = \text{{average speed}}\times\frac{25}{2} \times \frac{1}{60} hours$

=>$\frac{5}{2} = \text{{average speed}}\times \frac{ 5}{2} }\times \frac{1}{12} hours$

=>$1 = \text{{average speed}} \times\frac{1}{12}$

=>average speed = 12  

Hence, the average speed of the runner is 12 miles per hour.