Bankers Discount - General Aptitude

Q1:

The banker's discount on a bill due 4 months hence at 15% is Rs. 420. The true discount is:

A Rs. 400

B Rs. 360

C Rs. 480

D Rs. 320

ANS:A - Rs. 400

T.D.
= B.D. x 100
100 + (R x T)
= Rs. 420 x 100
100 + 15 x 1
3
= Rs. 420 x 100
105
= Rs. 400.