Question

sum of money becomes three times of itself in 12 years in what time will it becomes 81 times at same rate​

Answer 1

Answer:

81=(3)⁴

4×12=48 years

hope it helps you

Answer 2

Step-by-step explanation:

Let the amount of money be 'x'.

after 't' time money will be '3x' then

interest for time 't' is

SI=3x−x=2x

Given rate =25% p.a

then S.T= 100

PRT

⇒2x= 100/x×25×t

t= 25/200

=8years

∴ Time is 8 years.