GMAT Simple Interest Problems

Robin deposited $8000 which amounted to $9200 after 3 years at simple interest. Had the interest been 2% more, she would have got an extra income of ?

If is the interest on and is the interest on , the rate and time being same in both the cases, then what is the relation between , and ?

$2500 are divided into two parts such that if one part be put at 5% simple interest and the other at 6%, the yearly income obtained is $140. How much was lent at 5%?

If $1 amounts to $9 over a period of 20 years, then what is the rate of simple interest?

$4000 was divided into two parts in such a way that when first part was invested at 3% and the second at 5%, the total annual interest from both the investments is $144. How much was put at 3%?

If $1produces $9 over a period of 40 years, find the rate of simple interest.

A certain sum of money doubles itself in 10 years in how many years will it become three times of itself at the same rate?

$1500 are divided into two parts such that if one part is invested at 6% and the other at 5% the whole annual interest from both the sum is $85. How much was lent at 5%?

The simple interest on a sum of money is of the principal and the number of years is equal to the rate percent. Find the rate %.

In what time will $4000 lent at 3% per annum on S.I earn as much interest as $5000 will earn in 5 years at 4% p.a on S.I.