A rectangular plot measuring 90 metres by 50 metres is to be enclosed by wire fencing. If the poles of the fence are kept 5 metres apart, how many poles will be needed? Choose the correct choice from the following answers
A) 55
B) 56
C) 57
D) 58
E) 59
Solution   Perimeter of the plot	= 2 ( 90 + 50 )   = 280 m.   Number of poles	= (280 / 5)= 
<gadget id="calculator">(280 / 5)</gadget>
<output>56</output>
56 m.   Answer 56
<result>B</result>
A rectangular plot measuring 90 metres by 50 metres is to be enclosed by wire fencing. If the poles of the fence are kept 5 metres apart, how many poles will be needed?