Question

in 3 years the amount is 6325 and 4 1/2 years the amount is 6737.5. what is the principle and rate of interest?

Answer 1

let the interest be x for one yr
and principle be p
so a/q p+3x=6325 &
p+4.5x=6737.5
solving both equations we get 1.5x = 412.5 , so x= 275 is the interest
so P=6325-3×275=5500
so interest rate = 275×100/5500= 5% per annum