Multiple choice

A sum of money was invested at a certain rate of simple interest for 2 years. Had it been invested at 1% higher rate, it would have fetched Rs.24 more interest. The sum of money is साधारण ब्याज की किसी दर से कोई धनराशि 2 वर्ष के लिए निवेशित की गयी । यदि इसे 1% अधिक दर पर निवेशित किया गया होता तो 24 रू. अधिक ब्याज मिलता । वह धनराशि हैः

  1. Rs./रू.1200

  2. Rs./रू.2400

  3. Rs./रू.1500

  4. Rs./रू.1800
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A Correct answer
Explanation

For 2 years, a 1% higher rate yields Rs.24 more interest annually, so Rs.12 extra per year. This means Rs.12 equals 1% of the principal, giving principal as 12 times 100 equals Rs.1200. Formula: extra interest per year equals principal multiplied by rate difference.

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