Question

the simple interest of Rs 6400 in 7 years at 9% per annum will be the same as simple interest on Rs 12600 at 4% per annum in how many years ​

Answer 1

Step-by-step explanation:

first the Principal 1 = 6400/-

time 1 = 7years

rate of interest 1 = 9%

we have to find out the S.I of the whole.

S.I = P×R×T whole divided by 100 .

6400×9×7 whole divided by 100.

that is 64×9×7= 4032/-

so now we found the S.I that is 4032/-.

so as for the question says that the simple interest of rupees 6400 is the same of simple interest on rupees 12600 so now we will find the S.I of the 2nd one.

Principal 2 = 12600/-

let the time = X

rate of interest 2 = 4%

S.I = 4032/- which we have already found.

so now we will put the formula of finding time .

time=S.I×100 WHOLE DIVIDED BY P×R

time= 4032×100 whole divided by 12600×4

now the answer came = 8 years after simplifying it. hope this answer satisfied u if yes hit a heart

Answer 2

Step-by-step explanation:

SI of h₂6400 in 7 years at 1% per aroum.

Given : Same as of Rs 12600 at 4%. To find - In how many years for Principal of SI = (PR * 7)/16 is R12600

Solution:

6 400 x 9 x 1 =8₂4032

100

Now, Rs 4032 is Same as of SI 12600.50,

4032 = 12 600 x 4x T

40.32/504 = T

8 = Time

hence,

Answer:- In 8 years.