Question

How long will it take to travel 200km traveling 100 dm/s?

Answer 1

20000 seconds

Explanation:

We can calculate time by calculating the ratio between distance and speed, but to do this, they must have the same units. We can do the calculation knowing that the conversion factor corresponds to the fact that 1 kilometer is equal to 10000 decimeters, therefore:

`200km\cdot(10000dm)/(1km)=2\cdot10^6dm`

Now, we calculate the time:

`\begin{gathered} t=(s)/(v)=\frac{2\cdot10^6\text{ dm}}{100\text{ dm/s}} \\ t=20000\text{ s} \end{gathered}`

So it takes a total of 20000 seconds