Question

Pls tell answer and no spam pls​

Answer 1

Let’s first calculate the interest on ₹12000 at 5% for 7/2 years,

p = ₹900, r = 5% and n = 7/2

calculating the Simple Interest

SI = p*r*n/100

SI = (12000*5*7/2)/100

SI = ₹2100

since the interest is same for both, we will take ₹2100 as interest and calculate the sum/principal invested at the rate of 6% for the period of 5/2 years.

now, let the principal be x

SI = ₹2100, r = 6% and n = 5/2 years

calculating the principal by the same Simple Interest formula we used earlier

SI = p*n*r/100

2100 = (x*6*5/2)/100

x = 2100*100/15

x = 210000/15

x = ₹14000

so ₹14000 invested at rate of 6% for the period of 5/2 years will generate ₹2100 as interest as before.