Question

Q3. What is the rate of annual simple interest at which a sum of money would double itself in 25 years?
a. 4%
b.5%
C.6%
d. 8%​

Answer 1

Answer:

c) 6%......

Step-by-step explanation:

c)6%......

Answer 2

S.I. =(P×R×T)/100

let original principal be x

for the principal to be doubled in time T, the interest on it should be equal to the principal itself, which is x.

putting in these values in equation of simple interest we get-

x = x × R × 25/100

=> 1 = R × 1/4

=> R = 4

Hence, the rate is 4% p.a.