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ICSE Class 10 Answered

plz ans. this que.????
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Asked by soni96996 | 22 Jan, 2019, 11:38: PM
answered-by-expert Expert Answer
Interest for Recurring deposit of amount p for n months,  if rate of interest is r% per annum =  begin mathsize 12px style p cross times fraction numerator n open parentheses n plus 1 close parentheses over denominator 2 cross times 12 end fraction cross times r over 100 end style 
if p is the amount deposited every month by Mr. Britto, interest after 3 years is given by
 
begin mathsize 12px style p cross times fraction numerator 36 cross times 37 over denominator 2 cross times 12 end fraction cross times 8 over 100 space equals space 8088 space minus space 36 p end style
Above equation is simplified as,  4044×p = 808800,  hence  p = Rs.200
Answered by Thiyagarajan K | 23 Jan, 2019, 08:31: AM

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