Math, asked by mouryaindu58, 1 day ago

A person invested some amount at the rate of 8 % Simple interest and the remaining some other amount at the rate of 6% simple interest he received yearly interest of ₹500 but if he had interchanged the amount invested he would received ₹50 more as interest how much amount did he invest at different rates

Answers

Answered by subhransusahoo94
5

Answer:

Suppose the person invested Rs x at the rate of 12% simple interest and Rs y at the rate of 10% simple interest. Then,

Yearly interest =

100

12x

+

100

10y

100

12x

+

100

10y

=130

⇒12x+10y=13000

⇒6x+5y=6500 .(i)

In the invested amounts are interchanged, then yearly interest increased by Rs 4.

100

10x

+

100

12y

=134

⇒10x+12y=13400

⇒5x+6y=6700 ..(ii)

Subtracting equation (ii) from equation (i), we get

x−y=−200 .(iii)

Adding equation (ii) and (i), we get

11x+11y=13200

⇒x+y=1200 ..(iv)

Adding equations (iii) and (iv), we get

2x=1000⇒x=500

Putting x=500 in equation (iii), we get y=700

Thus, the person invested Rs 500 at the rate of 12% per year and Rs 700 at the rate of 10% per year.

Answered by angel565
1

Answer:

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