Question 1197040
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Hi  
t varies INVERSELY as v 
That is:  t = k/v
Given: 
t = 4 h when v = 45mph
   4 h= k/45mph,  {{{k = 4*45 = 180}}}
find v when t = 5 h 
      t = k/v  0r v = k/t 
                  v = {{{180/5}}} = 36mph
Wish You the Best in your Studies.
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