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11 Feb 2005, 20:19
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what is the volume in cubic feet, of one floor of a rectangular building with width x meter, length y meters and height z meters?
1) x=1200/yz
2) the area of the cieling on this floor is 120 sq feet, and the area of each of the two facing walls is 100 sq.ft
1) x=1200/yz
2) the area of the cieling on this floor is 120 sq feet, and the area of each of the two facing walls is 100 sq.ft
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11 Feb 2005, 21:50
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1) x=1200/yz
xyz=1200
sufficient
2) the area of the cieling on this floor is 120 sq feet, and the area of each of the two facing walls is 100 sq.ft
If each of the facing walls means xz and yz then
xy=120
xz=yz=100
x^2y^2Z^2=12000
xyz=12000^(1/2)
sufficient
D
xyz=1200
sufficient
2) the area of the cieling on this floor is 120 sq feet, and the area of each of the two facing walls is 100 sq.ft
If each of the facing walls means xz and yz then
xy=120
xz=yz=100
x^2y^2Z^2=12000
xyz=12000^(1/2)
sufficient
D
11 Feb 2005, 22:06
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A.
St1. xyz = 1200 Sufficient
st2. the ceiling could be 12x10 and the facing walls 10x10 which is a permissible set of numbers, the volume is 12x10x10. Or ceiling 24x5 and the facing walls 5x20 in which case the volume is 24x5x20 etc... Insufficient, if my interpretation of facing walls is correct.
St1. xyz = 1200 Sufficient
st2. the ceiling could be 12x10 and the facing walls 10x10 which is a permissible set of numbers, the volume is 12x10x10. Or ceiling 24x5 and the facing walls 5x20 in which case the volume is 24x5x20 etc... Insufficient, if my interpretation of facing walls is correct.
