A rectangular plot measuring 30 meters by 50 meters is to be enclosed by wire fencing. If the poles of the fence are kept 5 meters apart. How many poles will be needed?  Choose the correct choice
A) 46 m	B) 66 m	C) 26 m	D) 56 m	E) 32 m

Rationale: "perimeter of the plot = 2 ( 30 + 50 ) = 160 m no of poles = 160 / 5 = 32 m answer : e"
Answer: E