A rectangular field has to be fenced on three sides leaving a side of 20 feet uncovered. If the area of the field is 680 sq. feet, how many feet of fencing will be required?
Options:
A . 95
B . 92
C . 88
D . 82
Answer: Option C
Answer : Option C
Explanation :
Given that area of the field = 680 sq. feet => lb = 680 sq. feet Length(l) = 20 feet => 20 × b = 680
$MF#%\Rightarrow b = \dfrac{680}{20} = 34\text{ feet}$MF#%
Required length of the fencing = l + 2b = 20 + (2 × 34) = 88 feet
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