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Bobby can build a house in 24 days. Danny can build the same house in 36 days. Andy can build the same house in 27 days. If Bobby and Danny work together for 8 days, and will be continued by Andy, how long does Andy take to complete the remaining work?

 Jan 15, 2021

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 #1
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If Bobby works 8 days , he completes  8/24 house = 1/3 house

If Danny works 8 days he completes  8/36 house = 2/9 house

 

house remaining is   1 house - 1/3 - 2/9 = 12/27 house remaining to be built

 

Andy will need 12 days        12/27 house   /   1 house / 27days = 12 days

 Jan 15, 2021
 #1
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+1
Best Answer

If Bobby works 8 days , he completes  8/24 house = 1/3 house

If Danny works 8 days he completes  8/36 house = 2/9 house

 

house remaining is   1 house - 1/3 - 2/9 = 12/27 house remaining to be built

 

Andy will need 12 days        12/27 house   /   1 house / 27days = 12 days

Guest Jan 15, 2021

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