general math MCQ #453

An amount doubles itself in 5 year with simple interest. What is the rate of interest?

general math MCQ #453

  1. Question 1

    Q1. An amount doubles itself in 5 year with simple interest. What is the rate of interest?

    • A) 20%
    • B) 25%
    • C) 33%
    • D) 35%

    Answer: 20%

    Explanation: If the amount doubles, interest = principal, so SI = P = P × r × 5; solving gives r = 1/5 = 20%.