Asked by Soumya
The difference between compound interest and simple interest on a certain principal for two years at 20% rate of interest is Rs. 25. What is the Principal amount ? (Answer with theory)
Answers
Answered by
Reiny
let the principal be P
simple interest:
amount = P + .2P(2) = P(1 + .4) or 1.4P
compound interest amount = P(1.2)^2
P(1.2)^2 - 1.4P = 25
solve for P
simple interest:
amount = P + .2P(2) = P(1 + .4) or 1.4P
compound interest amount = P(1.2)^2
P(1.2)^2 - 1.4P = 25
solve for P
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