Tahir measured the distance around a square field as 200 rods (lathi). Later he found that the length of this rod was 140cm. Find the side of this field in metres.
Given:
Distance around square field = 200 rods
Perimeter of field = 200 rods
200 × 140 = 4 × side
28,000 / 4 = side
side = 7000
1m = 100 cm
∴ Side of field = 70 m