Question

The simple interest on a sum of money is 4/9 of the principal and the number of year is equal to the rate percentage per annum the rate per annum is

Answer 1

Answer:

Explanation:Answer:r= 20/3 %

t =20/3 years

Step-by-step explanation:

let the sum is 9x. so interest is 4x time is y so rate is also y

we know that  

i=\frac{p*r*t}{100}\\\\4x=\frac{9x*y*y}{100}\\\\\frac{400}{9}=y^{2}\\\\y=\frac{20}{3}

so  

r= 20/3 %

t =20/3 years