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A person invests 12000 as fixed deposit ...

A person invests 12000 as fixed deposit at a bank at the rate of 10% per annum simple interest . But due to some pressing needs he has to withdraw the entire money after 3 years, for which the bank allowed him a lower rate of interest. If he gets 3320less than what he would have got at the end of 5 years ., the rate of interst allowed by the bank is:(एक आदमी एक बैंक में 10 % वार्षिक साधारण बियाज की दर से रु 12000 सावधि कहते में जमा करता हे लेकिन 3 वर्ष के बाद वह अपनी जरुरत के लिए धनराशि बैंक से निकाल लेता है जिस्मे बैंक काम बियाज दर प्रदान करता है यदि वह 5 वर्ष के अंत में मिलने वाली धनराशि से रु३३२० काम प्राप्त करता है, तो बैंक द्वारा दी जाने वली बियाज दर बताए)

A

`7(5)/(9)%`

B

`7(4)/(9)%`

C

`7(8)/(9)%`

D

`8(7)/(9)%`

लिखित उत्तर

Verified by Experts

(b) Principal=12000, Rate%=10%
Interest paid by the person in 5years(3 वर्षो के बाद व्यक्ति द्वारा प्राप्त किया गया बियाज) `=(12000xx10xx5)/(100)=6000`
Interest recerived by the person after 3 years(5 वर्षो में व्यक्ति दवारा दिया गया बियाज)=(6000-3320)=2680
By using formula, `"Rate%"=(2680)/(12000)xx(100)/(3)=(67)/(9)=7(4)/(9)%`
Hence required Rate%=`7(4)/(9)`
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