If the interest is compounded half-yearly, find the Compound Interest on the sum of Rs.18500 at the rate of 40% per annum for 18 months.

Correct option is B

Half yearly rate = 40/2%=20%= 1/5
For 6 months, 5 – 6
Next 6 months, 5 – 6
Last 6 months = 5 – 6
After 18 months = 125 – 216
CI = 216 – 125 = 91
CI = 18500/125 ×91= Rs. 13,468