10.The banker's discount on Rs. 1600 at 15% per annum is the same as true discount on Rs. 1680 for the same time and at the same rate. The time is:
A.3 months B.4 months
C.6 months D.8 months
Answer: Option B
Explanation
S.I. on Rs. 1600 = T.D. on Rs. 1680.
Rs. 1600 is the P.W. of Rs. 1680, i.e., Rs. 80 is on Rs. 1600 at 15%.
Time =
|
|
100 x 80
|
year
|
=
|
1
|
year = 4 months.
|
1600 x 15
|
3
|
