Question

d) A square field with side 40m is to
be fenced with double wire.Length of
needed will be
1) 160 m
O 11)80m
O ili 1600m
O iv) 320m

Answer 1

Answer:

iv ) 320 m

Step-by-step explanation:

side = 40m

length of single fence = perimeter of square

= 4 × side

= 4 × 40

= 160 m .

length of double wire required = 160 × 2 = 320 m.

Answer 2

Answer:

✩ 320m of wire is required to fence the  square field with side 40m with double wire.

 SOLUTION  

We know that fencing is done along the sides of a field .

To find the length of wire required we must find the perimeter of the Square Field.

$\setlength{\unitlength}{1cm}\begin{picture}(0,0)\thicklines\multiput(0,0)(4,0){2}{\line(0,1){4}}\multiput(0,0)(0,4){2}{\line(1,0){4}}\put(-0.5,-0.5){\bf D}\put(-0.5,4.2){\bf A}\put(4.2,-0.5){\bf C}\put(4.2,4.2){\bf B}\put(1.5,-0.6){\bf\large 40m}\put(4.4,2){\bf\large 40m}\end{picture}$

Perimeter of a Square = 4 × a (Where 'a' is the side of the square )

Here ,

Side(a) = 40m.

∴ Perimeter of a square = 4 × 40

$\implies$

✳ Perimeter of a square = 160m.

∵It is said that the fencing is done with double wire ,

✳ Length of wire required = 2 × Perimeter of the square

∴ Length of wire required = 2 × 160 = 320m.