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?​

Answer 1

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Answer 2

Answer:

Step-by-step explanation:

Conversion of km to metre (1 km = 1000 metre)

0.7 km = 0.7 x 1000

= 700 metre

0.5 km = 0.5 x 1000

= 500metre

The piece of land is rectangular, it has to be fenced with wire.

We need perimeter of rectangle.

Perimeter = 2( L + B)

= 2(700 + 500)

= 2 x 1200

= 2400

Therefore, the perimetre of land is 2400meter

Perimeter of the land = length of wire fenced 1 time

2400m = length of wire

4 times of perimeter = length of wire needed for fencing 4 times

2400 x 4 = length of wire

9600 = length of wire

Therefore, 9600meter of wire is needed for fencing. (By conversion - 9.6km)

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