Question

at what rate of interest per annual the simple interest on a certain sum become 2 by 5 times of amount in 10 years at simple interest​

Answer 1

Answer:

Step-by-step explanation:

Let the principal be:x

Rate be:R

Time given is 10 yrs

Interest becomes 2x/5;

Substituting,

I = (P*R*T)/100;

2x/5= (x*10*R)/100;

Solving:

You get R=4

Ans. Rate= 4 %pa