Question

If the simple interest on a certain sum of money for 3 years is three-tenth of the
sum, then find the rate of interest per annum.​

Answer 1

Answer:

Rate % = 10%

Step-by-step explanation:

Given:

Time(t)=3years

S.I = Three tenth of the principal

To find :

Rate %

Let the principal be = x

S.I= 3/10 of x

S.I= p*r*t/100

3/10x= x*r*3/100

3x/10x = 3r/100

3/10* 100/3 = r

r= 10%

∴Rate % is 10%

Here * is refered as Multiplication