Elsa invested $500 in a fund for 4 years and was paid simple interest. The total interest that she received on the investment was $80. As a percentage, what was the annual interest rate of her investment?

Respuesta :

The annual interest rate of her investment would be = 4%

Calculation of annual interest rate

The principal amount invested= $500

The period of investment= 4years

The interest received= $80

The interest rate= ?

To calculate the interest rate use the formula,

SI = P×T×R/100

80 = 500 × 4 ×R/100

Make R the subject of formula,

R= 80 ×100/500×4

R= 8000/2000

R= 4%

Therefore, the annual interest rate of her investment would be = 4%.

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