Question

5. A rectangular piece of land measures 0.7 km by 0.5 km. Each side is to be
fenced with 4 rows of wires. What is the length of the wire needed?
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Answer 1

Step-by-step explanation:

The perimeter of a rectangular piece of land = 2(Length + Breadth)

= 2(0.7+0.5)

= 2(1.2)

= 2.4 km

$\because1km\ =\ 1000m∵1km = 1000m$

$\therefore0.24\ =\ 1000\times0.24=2400∴0.24 = 1000×0.24=2400 m$

Since 4 rows of wire is required.

$\therefore2400\times4=9600∴2400×4=9600 m$

$\therefore9600\ m\ =\ 9.6\ km∴9600 m = 9.6 km$

Therefore, length of wire required is 9.6 km or 9600 m.

Answer 2

Answer:

2400 m

Step-by-step explanation:

Area of the land = 700×500 ( 0.7 × 1000)(0.5 × 1000)

Area of the land = 3500m². = Noob do this method

But we need the measure of fence so we need the perimeter of the land = 2(700+500)

= 2 × 1200

= 2400m

So 2400 m or 2.4 km wire is needed

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