Find The Principal If The Interest Compounded At The Rate Of 10% Per

1.	Find The Principal If The Interest Compounded At The Rate Of 10% Per Annum For Two Years Is Rs. 420 ?
Answer» Given, Compound rate, R = 10% PER annum Time = 2 years C.I = RS. 420 Let P be the required principal. A = (P+C.I) Amount, A = P(1 + (r/100))N (P+C.I) = P[1 + (10/100)]2 (P+420) = P[11/10][11/10] P-1.21P = -420 0.21P = 420 Hence, P = 420/0.21 = Rs. 2000. Given, Compound rate, R = 10% per annum Time = 2 years C.I = Rs. 420 Let P be the required principal. A = (P+C.I) Amount, A = P(1 + (r/100))n (P+C.I) = P[1 + (10/100)]2 (P+420) = P[11/10][11/10] P-1.21P = -420 0.21P = 420 Hence, P = 420/0.21 = Rs. 2000.

Find The Principal If The Interest Compounded At The Rate Of 10% Per Annum For Two Years Is Rs. 420 ?

Answer»

Given,

Compound rate, R = 10% PER annum

Time = 2 years

C.I = RS. 420

Let P be the required principal.

A = (P+C.I)

Amount, A = P(1 + (r/100))N

(P+C.I) = P[1 + (10/100)]2

(P+420) = P[11/10][11/10]

P-1.21P = -420

0.21P = 420

Hence, P = 420/0.21 = Rs. 2000.