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Q.


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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a

9.6 km

b

4.8 km

c

5.9 km

d

3.4 km

answer is A.

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Detailed Solution


We will calculate the perimeter of the wire by applying the formula and substituting the given values. The total length of the wire can be found by multiplying the perimeter by 4.
Perimeter corresponds to the distance that is covered by a closed figure's boundary.
Formula Used:
Question Image
Obtaining the length of the wire.
 Question ImageThe length of the rectangular land is 0.7 km.
The breadth of the rectangular land is 0.5 km.
So the perimeter of the land:
Question Image
Calculating the length of the wire,
Each side is to be fenced with 4 rows.
Therefore the total length of the wire required =Question Image
The total length of the wire requiredQuestion ImageTherefore, option 1 is correct.
 
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