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On a certain sum the simple interest for `12(1)/(2)` year is `(3)/(4)` of the sum. Then the rate of interest is:(किसी निश्तित राशि पर वर्षो का साधारण बियाज इस राशि का है बियाज की दर ज्ञात कीजिए )
A. 5% per yr
B. 6% per yr
C. 7% per yr
D. 8% per yr

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(b) Let sum =x
Interest=`(3)/(4)x`
Interest=`(PRT)/(100)`
`(3)/(4)x=(x xxRxx12.5)/(100)` R=6%

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