SOLUTION: Arun can complete a task in 12 hrs. Bala can complete in 6 hrs. How much hrs will take to complete a task if they work together

Question 772082: Arun can complete a task in 12 hrs. Bala can complete in 6 hrs. How much hrs will take to complete a task if they work together
Answer by Cromlix(4381) (Show Source): You can put this solution on YOUR website!
Arun can complete task in 12hrs.
Bala can complete task in 6hrs.
Arun's rate = 1/12 job/hr.
Bala's rate = 1/6 job/hr
Together rate = 1/x job/hr
Rate + Rate = Combined rate
1/12 + 1/6 = 1/x
Common denominator = 12x
x + 2x = 12
3x = 12
x = 4
Therefore, together they can complete
the task in 4 hours.
Hope this helps.
:-)

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