A farmer borrowed ₹3600 at 15% per annum at simple interest. At the end of 4 years he cleared his debt by paying ₹4000 per annum and a Cow. The cost of the Cow is:

₹1760

Principal, P = 3600

Rate, R = 15% per annum

Time, T = 4 years

Simple Interest = P*R*T/100 = 3600*15*4/100

= 2160

Total Amount paid = 3600+2160 = 5760

Rather he paid 4000+ A cow = 5760

Cost of Cow = 1760

The correct answer is Option (4) → ₹1760