Trhe cost of fencing a square field at rupees 1.60 per m is rupees 3200 fin de the cost of reaping the field at rupees 1.20 per 100 square m

Answer 1

It would help if you proofread your questions before you posted them.

"reaping"?

Why is fencing 1.20 per 100 SQUARE meters?

1.20/100 = x/3200(?)