Question

a sum of money becomes 6 times of itself at simple interest in 25 years , how long it would it take for same amount to become double

Answer 1

Answer:

5 years

Step-by-step explanation:

A sum of money becomes 6 times of itself at simple interest in 25 years

Interest in 25 years: sum+x=6*sum => x= 5*sum= 500%

500% interest in 25 years

500%/25= 20% interest in 1 year

100% interest will double the sum in: 100%/20= 5 years

So, the answer is 5years.

Answer 2

Answer:

let the principal be x

then amount= 6x

si=6x-x=5x

R=5x×100/x×25

R=20

rate = 20 per annum

news amount=2x

si=2x-x=x

t=x×100/x×20=5

in 5 year principal will double itself