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If the amount and compound interst on RS. 9500 for 2 years for 1st years on 5 % p.a and 10% for the second year. |
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Answer» ANSWERLet the RATE of INTEREST be r %∴ S.I. In 2 YEARS = 1009500×r×2 =Rs.190rAnd, C.I. in 2 years = A - P=Rs.9500(1+ 100r ) 2 −9500Given : C.I. - S. i. = Rs.95⇒[9500(1+ 100r ) 2 −9500]−190r=95⇒9500(1+ 10000r 2 + 1002r )−9500−190r=95⇒9500+ 10095r 2 +190r−9500−190r=9510095r 2 =95⇒r 2 =95× 95100 =100andr=10∴ Rate of interest = 10% |
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