Question

How fast(miles per hours) is 100m in 14 seconds.

Answer 1

25714 miles per hour (approximately)

1) We need to convert some units when tackling this question.

2) We can write out the following using the speed formula:

$\begin{gathered} s=\frac{d}{t} \\ s=\frac{100}{14} \end{gathered}$

Note that 1 hour is equal to 3600 seconds. So we can write this for the time:

$s=\frac{100}{\frac{14}{3600}}=100\times\frac{3600}{14}=100\times\frac{1800}{7}=25714.28\text{mph}$

So, 100 miles in 14 seconds is equivalent to approximately 25714 miles per hour