Question

rupees 12000 is invested for 1 by half year at compound interest if rupees 15972 is received at the end of this period find the rate of interest per annum​

Answer 1

Step-by-step explanation:

According to question,

Amount- $15972

Principle-$12000

Time- 3half years

Rate%- ?

therefore,

A= p×(1+R÷100)^3

15972÷12000= (1+R÷100)^3

13331÷1000= (1+R÷100)^3

[1331÷1000]^3= 1+R÷100

11÷10 = 1+R÷100

(11÷10)- 1=R÷100

1÷10=R÷100

R= 100×1÷10

R= 10%

Hence ,

Rate % per annum is 10 %