SOLUTION: Gina and Cal can spray an orchard in 8 hours. Gina working alone would take 12 hours to do the job. How long would it take Cal working alone to do the job?

Question 449652: Gina and Cal can spray an orchard in 8 hours. Gina working alone would take 12 hours to do the job. How long would it take Cal working alone to do the job?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Gina and Cal can spray an orchard in 8 hours.
Gina working alone would take 12 hours to do the job.
How long would it take Cal working alone to do the job?
:
Let c = time required by Cal alone
:
Let the completed job = 1; (a sprayed orchard)
:
A typical shared work equation
+ = 1
Multiply by 12c, results
8c + 8(12) = 12c
96 = 12c - 8c
4c = 96
c =
c = 24 hrs Cal working alone
;
:
See if that flies
8/12 + 8/24 =
2/3 + 1/3 = 1
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