The cost of fencing a square field at ₹20 per meter is ₹1,600. What is the area of the field?

परिमाप = कुल लागत / दर = 1600 / 20 = 80 मीटर। भुजा = 80 / 4 = 20 मीटर। क्षेत्रफल = $20 imes 20 = 400$ वर्ग मीटर।