Question

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?
A) 56m
B) 65m
C) 34m
D) 36m

Answer 1

b is right option. ...

Answer 2

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Here is your answer.
Length of the rectangular plot is 90 m
Breadth of the rectangular plot is 50 m

Perimeter is 2( L + B)
$= 2(90 + 50) \\ = 2(140) \\ = 280 \: m$
If the poles of the fence are 5 m apart,
Then Number of poles =
$= \frac{280}{5} \\ = 56$
Option (A) is your answer
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