Question

a certain sum of money becomes there times in 12 years by simple interst the rate of interst ​

Answer 1

Step-by-step explanation:

Let money x and rate r then

$x + \frac{x \times r \times 12}{100} = 3x \\ \\ r = \frac{\cancel {2x }\times \cancel{100} \: {}^{50} }{ \cancel x \times \cancel {12} \: {}^{\cancel 6 \: {}^{3} } } = \frac{50}{3} = 16.67\%$