# Project #8348 - Engineering mathematics

Hi there, the question is a engineering mathematics based question, and could you please show your following out too in the answer so I know what steps to make in the future. Thankyou the question is below:

It is a well?established fact that the labour rate for fixing reinforcing bars depends on  the diameter of bar being fixed: the smaller the bar, the more labour hours per  tonne. The labour hours are also related to the complexity of the work.
The problem here is, as in most cases, a steel fixer will fix different diameters of bar  at  the  same  time.  However,  it  is  relatively  easy  if  proper  records  are  kept,  to  measure the total hours against the tonnage fixed.
So,  to  determine  this,  assume  you  have  looked  at  some  previous  records  (past  production figures and timesheets), as given below and use these to determine an  accurate figure in labour hours per tonne for fixing (a) 10mm, and (b) 16mm and (c)  20mm reinforcing bars.:

Month 1 : 15 tonnes of 20mm diameter, 12.0 tonnes of 16mm diameter and 8.0 tonnes of  10mm diameter fixed in a total of 539 labour hours.

Month 2:  5 tonnes of 20mm diameter, 9.7 tonnes of 16mm diameter and 6.9 tonnes of 10mm  diameter fixed in a total of 375 labour hours.

 Subject Mathematics Due By (Pacific Time) 06/27/2013 03:00 pm
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