Find the principal when:
final amount is $R s .4500$ at $20 %$ per annum for $5$ years

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Solution

$A m o u n t (A) = R s .4500$
$R a t e (R) = 20 %$
$T i m e (T) = 5 y e a r s$
Let Principal (P) $= R s .100$
Then $S . I . = \frac{P R T}{100}$
$= \frac{100 \times 20 \times 5}{100} = R s .100$
and amount = P + S.I. $= R s .100 + R s .100 = R s .200$
If amount is $R s .200$ then Principal $= R s .100$
and if amount is $R s .4500$ then principal
$= \frac{100}{200} \times 4500$
$= R s .2250$

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Find the principal when:final amount is Rs.4500 at 20% per annum for 5 years

Amount(A)=Rs.4500Rate(R)=20%Time(T)=5yearsLet Principal (P) =Rs.100Then S.I.=PRT100=100×20×5100=Rs.100and amount = P + S.I. =Rs.100+Rs.100=Rs.200If amount is Rs.200 then Principal =Rs.100and if amount is Rs.4500 then principal=100200×4500=Rs.2250

Find the principal when:
final amount is $R s .4500$ at $20 %$ per annum for $5$ years