The area of a rectangular field is 1600sqm. If the length of the field is 80m, find the perimeter of the field.
Given:
Area of field = 1600 sq.m
Length of field = 80 m
Area = l × b
b = 1600 / 80
= 20 m
Perimeter = 2 × (l + b)
= 2 × (80 + 20)
= 200 m.