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ICSE Class 8 Answered

1)The difference between compound intrest and simple intrest on an amount of Rs.15000 for 2 years is Rs.96.What is the rate of intrest per annum    
Asked by nathsantanukumar | 17 Aug, 2018, 11:17: AM
answered-by-expert Expert Answer
P = Rs. 15,000, CI - SI = 96
begin mathsize 16px style CI space minus space SI space equals space 96 straight P open parentheses 1 plus straight r over 100 close parentheses squared minus straight P minus straight P cross times straight n cross times straight r over 100 equals 96 15000 open square brackets open parentheses 1 plus straight r over 100 close parentheses squared minus 1 minus 2 cross times straight r over 100 close square brackets equals 96 open square brackets open parentheses 1 plus straight r over 100 close parentheses squared minus 1 minus 2 cross times straight r over 100 close square brackets equals 0.0064 Let space straight r over 100 equals straight R left parenthesis 1 plus straight R right parenthesis squared minus 1 minus 2 straight R equals 0.0064 1 plus 2 straight R plus straight R squared minus 1 minus 2 straight R equals 0.0064 straight R squared equals 0.0064 straight R equals 0.08 equals 8 percent sign space straight p. straight a. end styleSI = Rs. 96, n = 2 years
Answered by Sneha shidid | 17 Aug, 2018, 11:26: AM

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