Question

a rectangular piece of land measure 4.5 cm by 2.5cm.each side is to be fenced with four rows of wires.what. what is the total length of wire needed.

Answer 1

Wire needed
=perimeter of the piece of land ×no.of rows of fencing
=14×4=56cm

Answer 2

l = 4.5 m
b = 2.5 m

Perimeter of a rectangle = 2(l+b)
Perimeter of land = 2(4.5 +2.5) m
                              = 2(7) m
                              = 14 m

Amount of wire required = 4(perimeter)
                                          = 4(14) m
                                          = 56m