Question

find the sum which become rs 18000 at simple intrest in 8years at 5% rate of interest​

Answer 1

As per the data given in the question,

We have to determine the sum which becomes Rs. 18000 in 8 years with the interest rate of 5%.

As here,

Value of A = Rs. 8000

Rate of Interest = 5%

Time period = 8 years.

As we know that,

$A = P + SI$

As the type of interest is of Simple.

So, we will apply the formula of SI for finding the SI

So,

$SI = \frac{P\times R\times T}{100}$

So,

$A = P + SI\\A = P + \frac{P\times R \times T}{100}\\18000 = P +\frac{P\times 5\times 8}{100}\\18000 = P + 0.4 P\\=> 1.4P = 18000\\=> P = \frac{18000}{1.4}\\=> P = Rs \:12,857.14 \approx Rs.\:12858$