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Bunuel
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sumanainampudi
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Bunuel
Adam and Bill, each working at his own constant rate, are simultaneously constructing a brick wall. How long will it take them to complete the wall, which is 12 feet high, 22 feet long and 2 feet thick?

(1) Adam can complete a 3 foot long section of the wall in 4 hours.
(2) Bill can complete the entire wall in 19 hours.


(1) rate of adam known only ...insuff
(2) rate of bill known only ...insuff

combining we know each rate
suff

Ans C

how can we find rate of adam by stmt 1 ?

Please share ,what makes you derive statement 1 , insuff....??
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sumanainampudi
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Bunuel
Adam and Bill, each working at his own constant rate, are simultaneously constructing a brick wall. How long will it take them to complete the wall, which is 12 feet high, 22 feet long and 2 feet thick?

(1) Adam can complete a 3 foot long section of the wall in 4 hours.
(2) Bill can complete the entire wall in 19 hours.


(1) rate of adam known only ...insuff
(2) rate of bill known only ...insuff

combining we know each rate
suff

Ans C

how can we find rate of adam by stmt 1 ?
3 foot long section in 4 hours. 22/3 = 7 1/3 times 4 = approx 30 hours. insuff but with statement 2 together sufficient.
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