The present worth of a bill due sometime, hence is ₹

The present worth of a bill due sometime, hence is ₹ 2200 and true discount on the bill is ₹ 220. Find the banker's discount and banker's gain ?

1. BG = ₹ 22 and BD = ₹ 242
2. BG = ₹ 242 and BD = ₹ 22
3. BG = ₹ 11 and BD = ₹ 121
4. BG = ₹ 31 and BD = ₹ 343

Given that, PW = ₹ 2200, TD = ₹ 220
According to the formula,
BG = (TD)²/PW = (220 x 220)/2200 = ₹ 22
BD = (TD + BG) = ₹(220 + 22) = ₹ 242