Distance formula: d=rt,if r =50mph and d=125mi

Question

I've tried evereything

Answer 1

Distance formula comes from the basic notion of:

 

  Rate( per unit) x numbers = Total

 

  In case of total distance traveled: rate of traveling is called speed.

 

   Speed = 50 miles/ hr     Each hour travels 50 miles. Total miles traveled is 125 miles

 

    50 miles/ hr * h ( number of hours traveled) =125           miles

 

  h ( number of hours traveled )  = 125 miles =2.5hrs

                                               50 miles/hr

 if you write the  units they cancel each other, and

                                                                        then your answer comes as number of hrs

   

Answer 2

Hi Martin;

distance=(rate)(time)

125 miles=(50 miles/hour)(time)

Let's divide both sides by (50 miles/hour)...

(125 miles)/(50 miles/hour)=[(50 miles/hour)(time)]/(50 miles/hour)

Let's cancel where appropriate...

(125 miles)/(50 miles/hour)=[(50 miles/hour)(time)]/(50 miles/hour)

(125)/(50 /hour)=time

Let's note that //hour, the unit of hour in the denominator of the denominator, is the same as hour in the numerator.

[(125)/(50)]hour=time

2.5 hours=time