A seller uses faulty weight in place of a 2 kg weight and earns a 25% profit. He claims that he is selling on the cost

A seller uses faulty weight in place of a 2 kg weight and earns a 25% profit. He claims that he is selling on the cost price in front of the customers but uses a faulty weight. How much error is there in the 2 kg weight to gain 25%?

(a) 350

(b) 400

(c) 450

(d) 500

Sol:

2000g×100/125=1600g

2000-1600=400g