SIMPLE INTEREST

Let P = Rs. 100. Then, S.I. Rs. 60 and T = 6 years.
R = 100 x 60 = 10% p.a.
100 x 6
Now, P = Rs. 12000. T = 3 years and R = 10% p.a.
C.I.= Rs. 12000 x 1 + 10 3- 1
100
= Rs. 12000 x 331
1000
= 3972.
Answer: Option A
Explanation:
C.I. when interest
compounded yearly
= Rs. 5000 x 1 + 4 x 1 + x 4
100 100
= Rs. 5000 x 26 x 51
25 50
= Rs. 5304.
C.I. when interest is
compounded half-yearly = Rs. 5000 x 1 + 2 3
100
= Rs. 5000 x 51 x 51 x 51
50 50 50
= Rs. 5306.04
Difference = Rs. (5306.04 - 5304) = Rs. 2.04
18. The compound interest on Rs. 30,000 at 7% per annum is Rs. 4347. The period (in
years) is:
Answer: Option A
Explanation: