Kisna buys a cow for ₹15,000. After one year, he sells it for ₹18,500. After one year, again he buys the same cow at ₹19,000 and sells it for ₹22,300. What is the overall profit percentage of Kisna?

Kisna buys a cow for ₹15,000. After one year, he sells it for ₹18,500.

Cost price first time = 15000    Eq.(i)

Selling price first time = 18500    Eq.(ii)

After one year, again he buys the same cow at ₹19,000 and sells it for ₹22,300.

Cost price second time = 19000    Eq.(iii)

Selling price second time = 22300    Eq.(iv)

Overall profit percentage = $$\frac{Eq.(ii)+Eq.(iv)-\left(Eq.(i)+Eq.(iii)\right)}{Eq.(i)+Eq.(iii)}\times\ 100$$

= $$\frac{18500+22300-\left(15000+19000\right)}{15000+19000}\times\ 100$$

= $$\frac{40800-34000}{34000}\times\ 100$$

= $$\frac{6800}{34000}\times\ 100$$

= 20%