Someone invested x dollars at simple annual interest, and the investment, including interest will be doubled in 8 and 1/3 years. What will be the total amount of the investment after 25 years?
Choose the correct choice from the following answers:  A) x  B) 2x  C) 5x  D) 6x  E) 7x
Soln:-   x becomes 2x in 8.33 years.   x will become 3*2x in 25 years because the investment is SI and time is 25 years, 3 times 8.33   Answer: 6x   ANSWER:6x
<result>D</result>
Someone invested x dollars at simple annual interest, and the investment, including interest will be doubled in 8 and 1/3 years. What will be the total amount of the investment after 25 years?