Question

At what rate percent per annum will a sum of money double in 8yr?​

Answer 1

Answer:

let the sum be x

double of sum = 2x

ammount = 2x

simple intrest = 2x - x = x

rate = 100x/8x

rate = 25/2 = 12.5

proof:

suppose the sum be ruppees 800

800 * 12.5 * 8/100 = 800

si = 800

ammount = 1600

hope this helps let me know if u need to understand a particular step