Question

the difference between the compound interest and the simple interest on a certain sum of money at 15% per annum for 3 years is rupees 28 3.50 find the sum

Answer 1

hoping helps yu.....

Answer 2

$\huge\green{your \: answer}$
Let the sum be P
SI = PTR/100=P*3*15/100=45P/100=9P/20
CI = A-P=P (1+R/100)^n-P=P (1+15/100)^3-P
=P (115/100)^3-P
=P (23/20)^3-P
So by question CI-SI = 283.50
or P ((23/20)^3-1)-9P/20=P ((23/20)^3-1-9/20)=283.50
or P= 283.50/((23/20)^3-29/20)
or P = 4000 (ans)
4.2


$\huge\red{hope \: this \: helps}$