Ashifur August 8, 2023 - 14:20
Problem: Mr. Rahman gets Tk. 12,675 from his investment at the year. He invested Tk. 1,90,000 a part of which at the rate of 7.5% and the rest at the rate of 6% profit. How much money did he invest at the rate of Tk. 7.5% profit?

View all: AB BANK LTD. | PROBATIONARY OFFICER | WRITTEN QUESTION (MATH) SOLVE | 1997

Correct Answer: 85000 TK

Explanation:

Let, Mr. Rahman invested Tk. x at 7 5% profit.

For Tk. 100 Rahman gets Tk. 7.5

For Tk. x Rahman gets Tk. $\frac{7.5x}{100}$

Mr Rahman invested Tk. (190000 —x) at 6%

For Tk. 100 Rahman gets Tk. 6

For Tk. (190000 —x) Rahman gets Tk. $\frac{6(190000)}{100}$

Here we can say,

$\frac{7.5x}{100} + \frac{6(190000)}{100}$= 12675

=> 1.5x = 1267500 — 1140000

=> 1.5x = 127500

So, x = 85000 Tk.

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