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# A rectangular piece of land measures $ 0.7 \mathrm{~km} $ by $ 0.5 \mathrm{~km} $. Each side is to be fenced with 4 rows of wires. What is the length of the wire needed?

**Given:**

A rectangular piece of land measures $ 0.7\ km $ by $ 0.5\ km$

Each side is to be fenced with 4 rows of wires.

**To do:**

We have to find the length of the wire needed.

**Solution:**

We know that,

Perimeter of a rectangle of length $l$ and breadth $b$ is $2(l+b)$

The length of the rectangular piece of land $ = 0.7\ km$

The breadth of the rectangular piece of land $ = 0.5\ km$

Therefore,

The perimeter of the land $ = 2(0.7+0.5)$

$ =2(1.2)$

$ =2.4\ km$

Each side is to be fenced with $4$ rows of wires

This implies,

The length of the wire needed $=4\times$ perimeter of the land

$ = 4\times2.4\ km$

$ =9.6\ km$

The length of the wire needed is $9.6\ km$.

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