Question

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

Answer :

›»› The length of the wire needed are 9.6 km.

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 Find :

• What is the length of the wire needed?

Solution :

As we know that

→ Perimeter of rectangle = 2(length + breadth)

→ Perimeter of rectangle = 2(0.7 + 0.5)

→ Perimeter of rectangle = 2 * 0.7 + 2 * 0.5

→ Perimeter of rectangle = 1.4 + 1

→ Perimeter of rectangle = 2.4

Now,

The length of the wire needed = 4 rows * Perimeter of rectangle piece.

→ Wire needed = 4 * 2.4

→ Wire needed = 9.6

Hence, the length of the wire needed are 9.6 km.

Answer 2

Given:- dimensions of rectangular piece of land are 0.7km and 0.5km. And each side is to be fenced with 4 rows of wires.

To find:- the Length of wire needed for fencing.

Solution :-

Let the length of rectangle field is 0.7 km and breadth of rectangle field is 0.5 km.

⇒ Perimeter of rectangle field,

= 2 (length + breath)

= 2 (0.7+0.5)

= 2.4km

Now, length of fencing field will be equal to 4 times the perimeter of field.

⇒Length of fencing field,

= 4 × perimeter

= 4 × 2.4km

= 9.6km

Therefore, the length of wire needed is 9.6 km.