# 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?

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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 $9.6\ km$.

Updated on 10-Oct-2022 13:36:27