susan invested certain amount of money in 2 schemes A and B which offer interest at the rate of 8%per annum and 9% per annum. she received rupees 1860 as annual interest. however had she interchanged the amount of investment in 2 schemes she would have received rupees 20 more as annual interest. how much money did she invest in each schemes??

answer fastt!!

Let the money invested in scheme A=Rs. x

And money invested in Scheme B=Rs. y

Now schemes A and B  offer interest at the rate of 8%per annum and 9% per annum respectively and she received and annual interest of Rs. 1860

This means 8% of x + 9% of y=1860

or

Now if she interchanges the amounts invested in each scheme, she will get Rs.20 more as an annual interest.

That means 8% of y + 9% of x=1860+20

or

Now we solve (1) and (2) for x and y

and we get x=12000,y=10000

So money invested in Scheme A= Rs. 12000

and money invested in Scheme B= Rs.10000