Question

Length and breadth of a rectangular field is 0.7 km and 0.5 km respectively. We have to fence this field with a wire in 4 rows. What is the total length of wire we must use? 

Answer 1

Perimeter of field = 2 × (l + b) 

= 2 × (0.7 km + 0.5 km) 

= 2 × 1.2 km = 2.4 km 

Required length of wire will be 4 times of the Perimeter of field. 

Thus, length of wire = 4 × Perimeter 

= 4 × (2.4 km) = 9.6 km