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800 becomes 956 in 3 years at a certain ...

800 becomes 956 in 3 years at a certain rate of simple interest. If the rate of interest is increased by 4% what amont will 8000 becomes in 3 years?(रुपया 800 की राशि की किसी दर से 3 वर्षो में 956 हो जाती है। यदि बियाज दर 4 % बढ़ा दी जाए तो रुपया 800 की धनराशि का 3 वर्ष में मिश्रधन क्या होगा )

A

102.8

B

10.25

C

1052

D

1050

लिखित उत्तर

Verified by Experts

(c )
Rate%=`(156)/(800)xx(100)/(3)=(52)/(8)=(13)/(2)%`
Increased in Rates =`((13)/(2)+4)%=10.5%`
New interest=`(800xx10.5xx3)/(100)=252=1052`
Alternate(वैकल्पिक विधि )
Note:In such type of questions to save your valuable time follow the given below method.(इस प्रकार के प्रशनो बहुमूल्य समय के बचत के लिए आप नीचे दी गयी विधि का प्रयोग कर सकते है )
Increased in Rates=`4xx3=12%`
Hence increased in amount(मिश्रण में वृद्धि) `=800xx(12)/(100)=96`
Hence total amount(कुल मिश्रण में वृद्धि )=(96+956)=1052
Hence Required amount(तक)=1052
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