Question

a rectangular piece of land measures 7 km by 5 km each side is to be fenced with 4 rows of wire what is the length of the wire needed​

Answer 1

rectangle =

length=7km

width=5km

perimeter =2(l+b)

=2(7+5)km

=2(12)km

=24km

1 row =24km

so,4 rows=24×4=96km

96 km wire is required.

Answer 2

Here we have to find length of wire So,

Perimeter of rectangle= 2(l+B) × 4

= 8(7+5)

= 8(12)

= 96 Km.