Question

What will be the interest on a sum of 72,000 invested for 9 months at 20% rate of interest pa
compounded quarterly?​

Answer 1

Answer:

11349

Step-by-step explanation:

see the image..

i hope u understand the sum..

Answer 2

CI = ₹ 1138

Step-by-step explanation:

Principal = ₹ 72000

Time = 9 months

= 3/4

= 3/4*4

= 3

Rate = 20%

= 20/4

= 5 %

$ci = {p(1 + \frac{r}{100 \times 4}) }^{4n} - p$

CI = 72000 ( 1 + 5/ 100 )^3 - 72000

= 72000 ( 1 + 1/ 20 )^3 - 72000

= 72000 ( 21/ 20 )^3 - 72000

= 72000 * 21/20 * 21/20 * 21/20 - 72000

= 72 * 21/2 * 21/2 * 21/2 - 72000

= 9 * 21^3 - 72000

= 9 * 9261 - 72000

= 83349 - 72000

= ₹ 11349

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