Question

a man has ₹8000 part of which he lent at 5% and the rest at 4% the whole interest received was ₹390 in 1 year . How much did he lent at 4%?
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Answer 1

He lent 1000 at 4%

​Step-by-step explanation:

Let he lent $x$ ruppees at 5%

So the amount which lent at 4% will be $8000 - x$

Now as per question

$\frac{x*5}{100}$ + $\frac{(8000-x)*4}{100}$ = 390

$\frac{5x}{100}$ + $\frac{32000 - 4x}{100}$ = 390

$5x - 32000 - 4x = 39000$

So $x = 7000$

That means the amount which is lent at 4% is (8000 - 7000) = 1000 (Ans)