SOLUTION: It takes John and Amy Brogan 6 hours to build a sandcastle. It takes Paul and Cindy Carter 4 hours to make the same sandcastle. How long will it take all four people together to bu
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-> SOLUTION: It takes John and Amy Brogan 6 hours to build a sandcastle. It takes Paul and Cindy Carter 4 hours to make the same sandcastle. How long will it take all four people together to bu
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Question 821700: It takes John and Amy Brogan 6 hours to build a sandcastle. It takes Paul and Cindy Carter 4 hours to make the same sandcastle. How long will it take all four people together to build the sandcastle? Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! 1/a+1/j=1/6,
1/p+1/c=1/4,
1/a+1/j+1/p+1/c=1/x,
1/6+1/4=1/x
4/24+6/24=1/x
10/24=1/x
x=2.4 hours for all four together
