The plumber charged $30 to come to the house and $25 an hour while fixing the leak.If the finial bill was $105 how many hours was the plumber at Johns house

Question

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Answer 1

We know that $30 of the $105 bill was just to come to the house, leaving $75 of the bill due to the hours spent.  Since the rate per hour is $25/hour, that means 75/25 = 3 hours were spent at the house.

Answer 2

B = rh + f

105 = 25h + 30

75 = 25h

3 = h

Answer 3

Let x = number of hours

 

30 +25x = 105

 

25x = 75

 

x = 3

 

The plumber worked for 3 hours.

Answer 4

  $30 + $25/hr * t = $105

 -$30                       -$30

---------------------------------

           $25/hr * t = $75

           ------------     ----

           $25/hr          $25/hr

 

                         t =  3hr