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Simple interest on a sum of money for 5 years is  times the principal, the rate for simple interest is 

  1. 13%

Answer (Detailed Solution Below)

Option 4 :
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Detailed Solution

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Let P = principal, R = rate of interest and N = time period

Simple interest = PNR/100

Given,

N = 5 years​

Then,

⇒ 2/5 × P = (P × R × 5)/100

⇒ R = 200/25

 %

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