SOLUTION: Smith Engineering is in the process of reviewing the salaries of their surveyors. During this review,the company found that an experienced surveyor can survey a road bed in three h

Question 716023: Smith Engineering is in the process of reviewing the salaries of their surveyors. During this review,the company found that an experienced surveyor can survey a road bed in three hours. An apprentice surveyor needs seven hours to survey the same stretch of road. if the two work together, find out how long it will take them to complete the job.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Add their rates of working:
An experienced surveyor's rate = ( 1 road bed ) / ( 3 hrs )
An apprentice surveyor's rate = ( 1 road bed ) / ( 7 hrs )
Let = their time in hrs with both working

Multiply both sides by

Working together, it will take them
2.1 hrs to complete the job.
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