The simple interest on a sum of money is ` 50. What is the sum ? (R.B.I., 2003) I. The interest rate is 10% p.a. II. The sum earned simple interest in 10 years.
Answer
SELF-PRACTICE — the source book printed no answer.
Nothing is invented here, so this question has no answer on record.
Explanation
Given : S.I. = ₹50. I. gives, $R=10\%$ p.a. II. gives, $T=10$ years. $\therefore$ Sum $=\left(\frac{100 \times \text{S.I.}}{T \times R}\right)=₹\left(\frac{100 \times 50}{10 \times 10}\right)=₹50$. Thus, I and II together give the answer. ∴ Correct answer is (e).
Explanation as extracted from the printed page; notation may be imperfect.