Question

a certain sum of money Doubles itself at simple interest in 8 years in how many years will it be 3 times as a same rate

Answer 1

let sum or principal be x.

amount = 2x

interest 2x - x = x

R = I × 100/P × T

=> X × 100/8 × x
=> 100/8 = 12.5 %
--------------------------------
P =x

A = 3x

I = 2x (as subtracted)

Now time = I × 100/ P× R

=> 2x × 100 / X × 12.5
=> 200/12.5
=> 16



HENCE in 16 years it will be tripled.

Answer 2

16 is the answer mark as the brainliest