Mr.Karim wants to put up fencing around three sides of his rectangular yard and leave a side of 10 feet unfenced. If the yard has an area of 340 sq. feet, how many feet of fencing does he need?
A
74
B
84
C
64
D
None of these
Correct Answer: None of these
Area, Length×Width = 340 or, Lenght×10 = 340 So, Length = 340/10 = 34 feet Fencing needed = 34 + 34 + 10 = 78 feet