A gardener has 80 m of fencing wire. He can use this wire to enclose either a circular lawn or a square lawn. If he uses the entire wire in each case, what is the approximate ratio of the area of the circular lawn to the area of the square lawn?

उत्तर देखें और व्याख्या

उत्तर: (C) 1.27 : 1

व्याख्या

Circle r = 40/π, area = 1600/π ≈ 509.3; square area = 400; ratio ≈ 1.27 : 1.