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Three-fourths of the area of a rectangular lawn 30 feet wide by 40 feet long is to be enclosed by a rectangular fence. If the enclosure has full width and reduced length rather than full length and reduced width, how much less fence will be needed?
A. 5/2
B. 5
C. 10
D. 15
E. 20
Answer: B
Source: Official Guide
A. 5/2
B. 5
C. 10
D. 15
E. 20
Answer: B
Source: Official Guide
