Question

In how much time will a sum becomes double itself at 25/2 per annum

Answer 1

Answer:

here your answer

8 year's.

Explanation:

let the sum is 100

ATQ

sum becomes double

thus 200

we know that

A=p(1+TR/100)

here

A=200 ( total amount)

T= time=?

R=25/2=12.5

now

200=100(1+T(12.5)/100)

200/100=1+T/8

2=(8+T)/8

16=8+T

T=16-8=8 year's.

Answer 2

Answer:

Explanation:

Use the relation :

( n - 1 ) x 100 = rt

( 2 - 1 ) x 100 = 12.5t

t = 100/12.5 = 8 years

:-)