SOLUTION: The work principal states that if one person can do a job in time 'a' and another can do the same job in time 'b' that they can do the job together in time 't'. This is demonstrate

Question 50781: The work principal states that if one person can do a job in time 'a' and another can do the same job in time 'b' that they can do the job together in time 't'. This is demonstrated by the equation:
1 over a plus 1 over b = 1 over t
Write the expression in terms of a:
And then use t=5 hours and b=8 hours, approximately what is a?
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
A=5 HOURS B=8 HOURS & T IS THE TIME FOR THE COMBINED JOB.
THUS 1/A+1/B=1/T OR (A+B)/AB=1/T OR AB=AT+BT OR AB-AT=BT OR A(B-T)=BT OR
A=BT/(B-T)

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