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.
A) 56m B) 52m C) 27m D) 28m E) 19m
Length of the wire fencing = perimeter = 2(90 + 50) = 280 metres   Two poles will be kept 5 metres apart. Also remember that the poles will be placed   along the perimeter of the rectangular plot, not in a single straight line which is   very important.   Hence number of poles required = 280 / 5= 
<gadget id="calculator">280 / 5</gadget>
<output>56</output>
56   56mnswer: 56m
<result>A</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?