1. The simple interest on a sum for 5 years is Rs 16800. The rate of interest for the first 3 years is 8% per annum and for the next 2 years is 12% per annum. What is the value (in Rs) of sum?
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By: anil on 05 May 2019 02.05 am
Let the sum = Rs. $$100x$$ Rate of interest for first 3 years = 8% and for next 2 years = 12% => Simple interest = $$frac{P imes R imes T}{100}$$
=> $$(frac{100x imes 8 imes3}{100})+(frac{100x imes12 imes2}{100})=16800$$ => $$24x+24x=16800$$ => $$x=frac{16800}{48}=350$$ $$ herefore$$ Sum = $$100 imes350=Rs.$$ $$35,000$$ => Ans - (D)
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=> $$(frac{100x imes 8 imes3}{100})+(frac{100x imes12 imes2}{100})=16800$$ => $$24x+24x=16800$$ => $$x=frac{16800}{48}=350$$ $$ herefore$$ Sum = $$100 imes350=Rs.$$ $$35,000$$ => Ans - (D)