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At what rate percent per annum will the ...

At what rate percent per annum will the simple interest on a sum of money be 2/5 of the principal amounnt in 10years(किसी वार्षिक प्रतिशत की दर से किसी राशि का 10 वर्षो का साधरण बियाज मूलधन का 2 /5 होगा )

A

0.04

B

0.06

C

`5(2)/(3)`

D

`6(2)/(3)`

लिखित उत्तर

Verified by Experts

(a) Let principal (माना की मूलधन )=5units
Hence interest=`5xx(2)/(5)=2units` Time=10years
By using formula, Rate%=`(2)/(5)xx(100)/(10)=4%`
Alternate /(वैकल्पिक विधि)
Note:- In such type of question 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)

Requred Rate (अभीस्ट बियाज) %
`=2/5xx100/10=4%`
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