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Adam and Bill, each working at his own constant rate, are simultaneous

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Adam and Bill, each working at his own constant rate, are simultaneous  [#permalink]

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New post 21 Mar 2017, 05:18
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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.

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Re: Adam and Bill, each working at his own constant rate, are simultaneous  [#permalink]

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New post 21 Mar 2017, 10:50
Bunuel wrote:
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
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Re: Adam and Bill, each working at his own constant rate, are simultaneous  [#permalink]

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New post 22 Mar 2017, 21:07
rohit8865 wrote:
Bunuel wrote:
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 ?
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Re: Adam and Bill, each working at his own constant rate, are simultaneous  [#permalink]

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New post 23 Mar 2017, 03:19
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sumanainampudi wrote:
rohit8865 wrote:
Bunuel wrote:
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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Re: Adam and Bill, each working at his own constant rate, are simultaneous  [#permalink]

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New post 28 Mar 2017, 12:58
sumanainampudi wrote:
rohit8865 wrote:
Bunuel wrote:
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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Re: Adam and Bill, each working at his own constant rate, are simultaneous &nbs [#permalink] 28 Mar 2017, 12:58
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