Question

Aman got a salary of Rs. 8600. The salary was invested by him in two parts. Find the difference between the two parts of his salary, if in first part he got some simple interest at 15% per annum in 4 years, which was same as the second part which he invested at 20% for 3 years.​

Answer 1

Answer:

this is your answer the interst is same.

i found all part of his salary. check this answer please and give me 5 points carefully. i do this answer this relax mind this was right i know

Answer 2

Answer:

The difference between 2 parts of his salary is "0"

Step-by-step explanation:

Given that Aman salary is 8600

the salary was invested in two parts

on 1st part he got interest at  15% per annum, in 4 years

on 2nd part he got interest at 20% per annum, in 3 years

and it is given that the interests on both parts are equal

let the two parts are  $a$, $b$ and the interests are $a_{1}$ and $b_{1}$ respectively

interest on first part  $a$, $a_{1}$ =  $\frac{PTR}{100}$      [ P =$a$, T= 4 years, R =15 ]

  $a_{1} = \frac{a(4)(15)}{100}$ = $\frac{60a}{100}$ =$\frac{6a}{10}$ = $\frac{3a}{5}$  

interest on second part $b$, $b_{1}$ = $\frac{PTR}{100}$        [ P=$b$ , T=3 years, R=20%]

 $b_{1}$ = $\frac{b(20)(3)}{100}$ = $\frac{60b}{100}$ = $\frac{6b}{10}$ = $\frac{3b}{5}$  

∵ both interests on $a$ and $b$ are same $a_{1} =b_{1}$

                                                    ⇒ $\frac{3a}{5} = \frac{3b}{5}$

                                                    ⇒ $a =b$

                                                    ⇒  $a-b =0$

the difference between two parts that he invested is zero