Question

Find the principal, if the compound interest (compounded annually) at the rate of 10% per annum for three years is ₹331.​

Answer 1

Answer:

good question but is is already here

Answer 2

Answer:

P = Rs. 1000

Step-by-step explanation:

let P be the principal

r = 10% , n = 3

A = A = P(1 + r / 100) ^n

interest for 3 yrs is rs. 331

⇒ P ( 1  + r/100 )^n - P= I, I is the C.I

⇒ P (1  + 10/100 )^3 - P = 331

⇒ P [ ( 1  + 1 /10 )^3 -1 ] = 331

⇒ P [ (10 +1 /10)^3 - 1] = 331

⇒P [ (11/10)^3 - 1 ] = 331

P (1.331 - 1) = 331

P [ 0.331 ] = 331

P = 331 / 0.331

P = Rs. 1000