A rectangular plot measuring 90 metres by 60 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 ?  Select.
A) 55 B) 56 C) 60 D) 58 E) None of these
Solution   Perimeter of the plot = 2(90 + 60) = 300 m.   ∴ Number of poles = [300/5= 
<gadget id="calculator">300/5</gadget>
<output>60</output>
60m Answer 60
<result>C</result>
A rectangular plot measuring 90 metres by 60 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 ?