Question

a square piece of field has each side equal to 150 metre.if 3 layer of barbed wire has to be used to fence it ,what is the length of the wire required ? also find the total cost of wire if a metre of wire cost 2 rupees​

Answer 1

Answer:

The length of wire required is 1800 meter and total cost of wire is Rs 3600

Step-by-step explanation:

Side of square field = 150 metre

1 layer of wire around square field  = permeter of square

Now, Perimeter of square is calculated

$Perimeter =  4 \times 150\\\\ Perimeter = 600m$

For 1 layer of barbed wire, wire needed $= 600m$

Thus, for 3 layer of barbed wire, wire needed $=3 \times 600 = 1800 m$

Thus, length of wire required is 1800 meter.

Also, cost of 1 metre of wire $= Rs 2$

Thus, cost of 1800 metres of wire $= 1800 \times 2 = Rs 3600$

Thus, total cost of wire is Rs 3600

Answer 2

Each side = 150m

Four sides = 4 x 150

= 600m

3 layered = 600 x 3

= 1800m

Cost = 2Rs. Per meter

Hence total cost = 2 x 1800 m

=> Rs. 3600