1. Rohan borrowed a certain sum of money at simple interest. Rate of interest was 3% per annum for first 3 years, 4% per annum for next 5 years and 6% per annum for next 7 years. If he paid Rs 2059 as interest, then what is the sum borrowed (in Rs)?
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By: anil on 05 May 2019 01.46 am
Let sum borrowed = Rs. $$100x$$ Rate of interest for first 3 years = 3% , for next 5 years = 4% and for next 7 years = 6% => Simple interest = $$frac{P imes r imes t}{100}$$ => $$frac{100x imes3 imes3}{100}+frac{100x imes4 imes5}{100}+frac{100x imes6 imes7}{100}=2059$$ => $$9x+20x+42x=2059$$ => $$x=frac{2059}{71}=29$$ $$ herefore$$ Sum = $$100 imes29=Rs.$$ $$2900$$ => Ans - (C)
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