Question

A sum of money becomes 8 times in 3 years then in how many years will the same sum become 27 times at the same rate of interest compounded annually

Answer 1

Solution 1 :-------

Let us consider the following;

 Principal = P, Rate = R% per annum,
 Time = T years and A = Amount due after 3 years

so,

Amount =P(1+R100)38P
             =P(1+R100)38
             =(1+R100)32
             =1+R1001
             =R100R
             =100%

Solution 2 (using formula):---------

If a certain sum becomes n times in t years, then the rate of compound interest

=[n(1/t)−1]×100%
=[8(1/3)−1]×100%
=(2−1)×100%
=100%

Answer 2

Answer:

hope it will help you

Step-by-step explanation:

mine is the same