Question

the simple interest on rs 800 when invested at a certain rate of interest p.a for 4 year is equal to that on rs 625 when invested for 8 year at a rate of 4% p.a find the rate of interest p.a​

Answer 1

Answer:

Step-by-step explanation:

P1 = ₹800

R1 = ?

T1 = 4 years

P2 = ₹625

R2 = 4%

T2 = 8 years

Now, according to the question,

(800 × 4 × R1)/100 = (625 × 4 × 8)/100

=> 800 × 4 × R1 = 625 × 4 × 8

=> R1 = (625 × 4 × 8)/(800 × 4)

=> R1 = 20000/3200

=> R1 = 6.25 %

The rate percent in the first case was 6.25%.