Thread: Simple interest

Hi,
I'm trying to figure out, how to solve this problem, I'm sorry about my english, I've tryed to do my best to translate the problem properly.

Question:

Mr. A as deposited a given amount, on a anual tax of 7%. After 6 months, Mr B deposited more $1200 then Mr A, but on an anual tax of 9%. After 18 months from the first aplication (by Mr A), Mr B recieved an interested of $27,75 more then Mr A

Considering Simple Interest regime, determinate how much was deposited by each one


Any sugestion is appreciated! Tks!

Originally Posted by heldrida

Question:

Mr. A as deposited a given amount, on a anual tax of 7%. After 6 months, Mr B deposited more $1200 then Mr A, but on an anual tax of 9%. After 18 months from the first aplication (by Mr A), Mr B recieved an interested of $27,75 more then Mr A

Considering Simple Interest regime, determinate how much was deposited by each one


Any sugestion is appreciated! Tks!

Comprehensible translation. A little rough, but I think I get it.

A = Amount deposited by Mr. A
B = Amount deposited by Mr. B
B = A + 1200

Interest for Mr. A: IA = A * 0.07 * (18/12)

Interest for Mr. B: IB = B * 0.09 * (12/12)

IB - IA = $27,75

Can you finish?

For your benefit, let's see if I can re-translate for you.

Mr. A deposited a given amount with an annual interest rate of 7%. After 6 months, Mr B deposited $1200 more than Mr A, but with an anual interest rate of 9%. After 18 months from the first deposit (by Mr A), Mr B recieved interest of $27,75 more then Mr A.

Use Simple Interest and determinate how much was deposited by each.

Thanks a lot!

I'm going review your answer and check with my own! Hopefully I can finish it, this time, let's see...

Hi again,

I've done my best on this problem, but I've still not reached the same result that I find on "solutions", that is:

A = 5.350
B = 6.550

I'm probably missing something, I dont know, its hard to learn stuff alone.

Thanks

Originally Posted by heldrida

A = 5.350
B = 6.550

CORRECT...if that means $5,350 and $6,550.

Don't forget to divide percentages by 100 when doing calculations;
as example, 7% = .07

Ah! Thanks finally solved =D