SOLUTION: John and Shirley, can paint the deck in 9 hours. Working alone, Shirley takes three times as long as John. How long does it take John to paint the deck?
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Question 432661: John and Shirley, can paint the deck in 9 hours. Working alone, Shirley takes three times as long as John. How long does it take John to paint the deck? Answer by edjones(8007) (Show Source):
You can put this solution on YOUR website! Together they can do 1/9 the job in 1 hr.
Let j=time it takes john to do the job and s=time it takes shirley.
s=3j
1/j + 1/3j = 1/9
9+3=j multiply each side by 9j
j=12 hrs
.
Ed
