SOLUTION: http://www.24houranswers.com/sat/122Dfigures3Dsolids.pdf Here's a link.I need help with questions 27,28,and 29.There's diagrams to help solve those problems.Please help and thank

Question 475172: http://www.24houranswers.com/sat/122Dfigures3Dsolids.pdf
Here's a link.I need help with questions 27,28,and 29.There's diagrams to help solve those problems.Please help and thank you so much for your time to help me with these problems!
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
27. Only two of the five diagonals have positive slope (BD has slope zero), so C) Two is correct.

28. Given that the tile can tessellate the plane (which it can), the area of one tile is 3 ft^2, and the area of the floor is (30 ft)(20 ft) = 600 ft^2. 600/3 = 200, so C) 200 is correct.

29. This question looks somewhat ambiguous since "straight line" on a curved surface can mean different things. Obviously, the least possible distance from A to B is sqrt(41) because you can draw a right triangle with legs 4 and 7. Or, you could draw a line that "wraps" around the cylinder, which could be infinitely long. I would have to go with E) sqrt(41) though.
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