It takes you 3 hours to drive 135 miles. you drive 55 miles per an hour on highways and 40 miles per an hour on other roads. How much time do you spend drivings

Question

It takes you 3 hours to drive 135 miles. you drive 55 miles per an hour on highways and 40 miles per an hour on other roads. How much time do you spend drivings on highways? how much time do you spend driving on other roads?

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Answer 1

Try setting h to be the number of hours you spend driving on highways.

Then 3-h will be the amount of time left driving on other roads (since total of 3 hours driving).

 

Using rate x time = distance:

 

55h + 40(3-h) = 135

 

I think you can solve from here. Let me know if this needs more clarification.

 

 

Answer 2

Let consider

number of hour driving on highway=h

number of hour driving on other road=3-h

 

 

Distance = speed * time

 

Distance on highway= 55*h=55h

 

distance on another road = 40*(3-h)=120-40h

 

total distance covered=135 miles

 

Distance on highway + distance on another road=135

 

                     55h + 120-40h =135

 

 

                       15h= 15

 

                          h=1

 

 

number of hour driving on highway=h  = 1 hr
number of hour driving on other road=3-h =3-1=2 hrs