The banker’s gain on a bill due 1 year hence at 10% per

The banker’s gain on a bill due 1 year hence at 10% per annum is Rs. 20. What is the true discount?

Here , Banker's Gain = Rs. 20 , Time = 1 year and Rate = 10%
According to question ,

True Discount =	Banker's Gain × 100
	Time x Rate

True Discount =	20 × 100
	1 x 10

∴ True Discount = 200
Hence , true discount is Rs. 200 .