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Simple interest on a certain sum at a certain annual rate of interest is $\frac{16}{25}$ of the sum. If the number representing rate per cent and time in years be equal then the rate of interest is

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Simple interest on a certain sum at a certain annual rate of interest is $\frac{16}{25}$ of the sum. If the number representing rate per cent and time in years be equal then the rate of interest is
1). 8%
2). $11\frac{1}{2}$%
3). $12\frac{1}{2}$%
4). $12\frac{1}{4}$%

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2 answers

1 vote
Answered by on | Votes 1 |
8% seems correct.

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3 vote
Answered by on | Votes 3 |

This is the right answer

Let the rate of interest be r%
and principal be P.
According to the question

$\frac{16P}{25}$ = $\frac{P \times r\times r}{100 }$

r =8%




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