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Alenkasestr [34]
3 years ago
10

A principal that will amout to 150000 for 8 years at 9/1/2 %​

Mathematics
1 answer:
bazaltina [42]3 years ago
3 0

The principal amount is 85227.27 and the interest is 64772.73.

<u>Solution:</u>

Given:

Amount (A)= 150000

Number of years (n)= 8

Rate of interest (r)= 9\frac{1}{2}\%=\frac{19}{2}\%

To find: The principal (P)

We know that the principal is the sum of amount and interest. That is, \bold{P+I=A}

This can be written as \bold{I=A-P \rightarrow(1)}

The formula of simple interest is \bold{I=\frac{Pnr}{100} \rightarrow(2)}

On equating (1) and (2) we get,

\Rightarrow\bold{A-P=\frac{Pnr}{100}}

On substituting the values we get,

\Rightarrow\bold{150000-P=\frac{P\times8\times19}{100\times2}}

On solving we get,

\bold{\Rightarrow 150000-P=0.76P}

On grouping the like terms together we get,

\bold{\Rightarrow 150000=0.76P+P}

\bold{\Rightarrow 150000=1.76P}

\bold{\Rightarrow P=\frac{150000}{1.76}}

\bold{\Rightarrow P=85227.2727\approx85227.27}

If principal is 85227.27, then the interest will be \bold{I=150000-85227.27\rightarrow64772.73}

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