Perry goes for a 2-hour trip through towns and on country roads. If she averages 55 mph on country roads and 25 mph through towns, and if she travels three times as far on country roads as she does through towns, what is the total length of her trip?

and

So then the total lenght is :

Step-by-step explanation:

For this case we assume that:

x (miles) represent the distance driven in town at a speed of 25 mph

3x (miles) would represent the distance for country road at a speed of 55 mph

And we know that the total time is 2hr.

Let the time for the town and the time for the country, we can set up the following equation for the time:

From the definition of distance we have that D = vt if we solve for the time we got t= D/v and if we replace we got:

And now we can solve for x like this:

and

So then the total lenght is :

the correct answer is 1: 2

step-by-step explanation:

hope this your welcome : )