SOLUTION: The time (t) of travel on an automobile trip varies inversely as the speed (v) of the automobile. Traveling at an average speed of 45 mph, a trip took 4 h. The return trip took 5 h

Algebra ->  Numeric Fractions Calculators, Lesson and Practice -> SOLUTION: The time (t) of travel on an automobile trip varies inversely as the speed (v) of the automobile. Traveling at an average speed of 45 mph, a trip took 4 h. The return trip took 5 h      Log On

Hi  
t varies INVERSELY as v 
That is:  t = k/v
Given: 
t = 4 h when v = 45mph
   4 h= k/45mph,  
find v when t = 5 h 
      t = k/v  0r v = k/t 
                  v =  = 36mph
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