The bankerâ€™s discount of a certain sum of money is Rs. 90 and the true discount on the same sum for the same time is Rs. 60. The sum due is	Options.
A) 210
B) 180
C) 360
D) 450
E) None
Sol.   Sum = B.D. * T.D. / B.D. - T.D. = Rs.[90 * 60 / 90 - 60] = Rs. [90 * 60 / 30] = Rs. 180   Answer 180
<result>B</result>
The bankerâ€™s discount of a certain sum of money is Rs. 90 and the true discount on the same sum for the same time is Rs. 60. The sum due is