SOLUTION: Calculate and highlight clearly for me, if 8 men can paint a house for 15hours, how long it will takes 6 men to paint the same house?

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Question 993121: Calculate and highlight clearly for me, if 8 men can paint a house for 15hours, how long it will takes 6 men to paint the same house?
Found 2 solutions by CubeyThePenguin, ikleyn:
Answer by CubeyThePenguin(3113) About Me  (Show Source):
You can put this solution on YOUR website!
8 men/15 hours = 6 men/x hours
8/15 = 6/x
x = (15 * 6)/8

x = 90/8 = 11.25 hours

Answer by ikleyn(52786) About Me  (Show Source):
You can put this solution on YOUR website!
.

            The mistake which  @CubeyThePenguin made in his post is   H U G E.

            I   N E V E R   saw people making such a   H U G E   mistake in such simple problem.

            Below find my  2-lines correct solution. 



The entire job is   8 men * 15 hours = 120 man-hours.


6 men will complete the job in  120%2F6 = 20 hours.    ANSWER

Solved (correctly).


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Direct proportion, which @CubeyThePenguin uses in his  (or her) post,  DOES  NOT  WORK  for this problem.


For your safety,  ignore his post.

Consider it as an example on how this problem should  NEVER  be solved.