SOLUTION: Please help me solve this problem: If it takes 15 children ten hours to complete half of a group project, how long will it take four children to complete the other half? (type valu

Question 926606: Please help me solve this problem: If it takes 15 children ten hours to complete half of a group project, how long will it take four children to complete the other half? (type value only, no need to type units)
My solution:
Let x be the number of hours taken.
15:10=4:x
x=2.66
However, the solution is incorrect.
Thank you very much!
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
If it takes 15 children ten hours to complete half of a group project, how long will it take four children to complete the other half?
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Obviously it will take 4 children more time than 15 children, right?
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1/2 the job takes 15*10 = 150 C*hours
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150 C*hrs/4 C = 37.5 hours.
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