The difference of S.I and C.I on an amount of Rs. 40000 for 2 years is Rs. 196. What is the rate of interest?
=> CI – SI = P(R/100)2 => 196 = 40000 (R/100)2 => (R/100)2= 49/10000 => R/100 = 7/100 => R = 7%
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