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A company contracts to paint 3 houses. Mr.Brown can paint a house in 6 days while Mr.Black would take 8 days and Mr.Blue 12 days. After 8 days Mr.Brown goes on vacation and Mr. Black begins to work for a period of 6 days. How many days will it take Mr.Blue to complete the contract?
A7
B8
C11
D12
Answer: Option (Login/Signup)
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Work done by Mr.Brown in 1 day = 1/6 Work done by Mr Black in 1 day= 1/8 Work done by Mr blue in 1 day= 1/12
Hence Acc to the question: 1/6*8 1/8*6 x*1/12= 3 ( 3 because complete work is to paint 3 houses).
Solving this we get x= 11
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STEP-BY-STEP
Work done by Mr.Brown in 1 day = 1/6 Work done by Mr Black in 1 day= 1/8 Work done by Mr blue in 1 day= 1/12
Hence Acc to the question: 1/6*8 1/8*6 x*1/12= 3 ( 3 because complete work is to paint 3 houses).
Solving this we get x= 11
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