Question

at what rate per annum interest will a sum became three times of itself in 12 years​

Answer 1

Answer:

let

$\frac{x \times y \times 12}{100} = 2x$

so that , total amount be x+2x=3x

the interest be x ,

and deposited amount be y

and time =12

$x \times y \times 12 = 200x$

y=200/12

y=50/3

interest rate will be 16.666667%