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The simple interest on a sum of money is `(8)/(25)` of the sum. If the number of years is numerically half the rate percent per annum. Then the rate percent per annym is(एक धनराशि पर साधारण बियाज उस रही का है| यदि वर्षो की संख्या प्रति वर्ष दर की प्रतिशत से संख्यात्मक रूप से आधी हे, तो प्रति वर्ष दर क्या है )

A

5

B

4

C

`6(1)/(4)`

D

8

लिखित उत्तर

Verified by Experts

(d) ATQ=`(8)/(25)`
Time=(R )/(2), Rate=R
Now `8xx(25xxRxxR)/(100xx2)`
`=[S.I=(P.R.T)/(100)]`
`8-(R^(2))/(4xx2) Rightarrow 64=R^(2)` R=8%
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