1. A took a certain sum as loan from bank at a rate of 8% simple interest per annum. A lends the same amount to B at 12% simple interest per annum. If at the end of five years, A made profit of Rs. 800 from the deal, how much was the original sum ?
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By: anil on 05 May 2019 01.30 am
Let the original sum be Rs. x.
Interest A paid to bank=$$frac{x imes8 imes5}{100}$$.
Interest B paid to A=$$frac{x imes12 imes5}{100}$$.
Therefore, profit made by A=Interest B paid to A-Interest A paid to bank.
$$800=frac{20x}{100}$$.
$$800=frac{x}{5}$$.
$$x=4000$$.
Hence, Option B is correct.
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Interest A paid to bank=$$frac{x imes8 imes5}{100}$$.
Interest B paid to A=$$frac{x imes12 imes5}{100}$$.
Therefore, profit made by A=Interest B paid to A-Interest A paid to bank.
$$800=frac{20x}{100}$$.
$$800=frac{x}{5}$$.
$$x=4000$$.
Hence, Option B is correct.