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CBSE Class 7 Answered

A certain sum becomes 283.75 and 306.25 rupees in 3 and 5 years.find annual rate of interest
Asked by anandpr847 | 12 Oct, 2018, 03:58: PM
answered-by-expert Expert Answer
Use the Formula: Amount = P + begin mathsize 16px style PNR over 100 end style
Substitute the values, we get
 
283.75 = P begin mathsize 16px style open parentheses 1 space plus space fraction numerator 3 straight R over denominator 100 end fraction close parentheses end style  ...(i)
 
 
306.25 = P begin mathsize 16px style open parentheses 1 space plus space fraction numerator 5 straight R over denominator 100 end fraction close parentheses end style  ...(ii)
 
From(i) , substitute the value of P in (ii), we get
306.25(100 + 3R) = 283.75(100 + 5R)
 
 
Solve the equations and get the value of R.
Answered by Yasmeen Khan | 12 Oct, 2018, 05:19: PM
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