What principal amount would yield an interest of $36 in 3 years at 3%?

P=

Answer: Let principle sum be x

Time = 3 years

Rate = 3% per annul

SI = $36

SI = / frac{P*R*T}{100}

36 = / frac{x*3*3}{100}

x = 36 * / frac{100}{9}

x = 400

So the sum that would yield interest of $36 is $400