A man lends Rs.1200 for 3 years. Apart he lends on 4% and rest on 6%

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RRB TC CC Exam (Chandigarh) 2008 click here to view all questions

A man lends Rs.1200 for 3 years. Apart he lends on 4% and rest on 6% and receives Rs.192 as interest. The money he lent on 6% rate is

ARs.720

BRs.840

CRs.800

DRs.515

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Answer is :Rs.800 Explanation If amount lend at 4% interest = x and at 6% interest = 1200 -x Given, $\Big(\frac{x \times 3 \times 4}{100}\Big)+\Big(\frac{(1200-x)\times3\times6}{100}\Big)=192$ $=>\frac{12x}{100}+\frac{21600}{100}-\frac{18x}{100 }= 192$ $=>\frac{12x+21600-18x}{100} = 192$ $=> \frac{-6x+21600}{100}=192$ $=> 21600 -6x = 19200$ $=>6 x = 21600 -19200$ $=> 6x = 2400$ $=> x = 400$ $\therefore \text{ the money lent on 6% rate is } = 1200 -x$ = 1200 - 400 =800 Nithin K ? answered Apr 1 '2018 at 23:51 All Comments

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