Hashem wants to put up fencing around three sides of his rectangular yard and leave a side of 20 feet unfenced. If the yard has an area of 680 square feet. How many feet of fencing does he need?
A. 34
B. 40
C. 68
D. 88
E. None of these
সঠিক উত্তরঃ
D.
88
Explanation:
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