Karina has a wheat business. She purchases wheat from a local wholesaler at a particular per pound. The price of the wheat at her local is tk. 30 per kg. Her faulty spring balance reads .90 kg for a kg.Also in the festival season she gives 10% discount on the wheat. She found that she made neither a profit nor a loss in the festival season. At what price did Karina purchase the wheat from the wholesaler?

Let, She bought 10 pounds first.
Because of her faulty spring, she sold 10 pounds as 9 pounds.
Selling price: 9×3 = $ 27
Deducting 10% discount = 27 – (27×10%) = $24.3
So for one pound the value = $ (27 – 24.3) = $ 2.43

The selling price after offering 10% discount = 30 - 10% of 30 = 27

Now,she collects money for 0.9 kg and there is neither profit nor loss, hence, her selling price = 27 * 0.9 = 24.3 which should be the cost price for 1 kg of wheat.

The cost is Rs. 24.3 per kg
= Rs. (24.3/2.2) per pound
= Rs.11.045 per pound.