A rectangular plot measuring 10 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 most appropriate option
A) 46 m
B) 66 m
C) 26 m
D) 24 m
E) 25 m

Rationale: "perimeter of the plot = 2 ( 10 + 50 ) = 120 m no of poles = 120 / 5 = 24 m answer : d"
Answer: D