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
Algebra.Com
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
RELATED QUESTIONS
IF IT TAKES SALLY 4 HOURS TO PAINT A HOUSE AND IT TAKES JOHN 6 HOURS TO PAINT THE SAME... (answered by funmath)
It takes 3 hours to 4 adults to build a sand castle. It takes 4 hours to 6 children to... (answered by josmiceli)
My teacher is making us do this project where we have to think of word problems for each... (answered by stanbon)
it takes Tom and John 2 hours to do a certain job,it takes tom and harry 3 hours to do... (answered by Edwin McCravy)
Sally takes 4 hours to paint and john takes 6 hours how long will it take both to paint... (answered by rwm)
It takes Peter 4 hours to make a 25 sq yd piece of land.
It takes John 5 hours to make a (answered by josmiceli)
if it takes sally 4 hours to paint a house and it take john 6 hours to paint the same... (answered by Paul)
It takes John 4 1/2 hours to complete a job alone, and it takes 2 hours for Laura to do... (answered by Mathtut)
If it takes Sally 4 hours to paint a house and John 6 hours to paint the same house, how... (answered by stanbon,RAY100)