Multiple choice

A sum of money was invested for “X” years in scheme A offering simple interest. The amount received after “X” years was twice the sum of money invested in the scheme. What will be the amount received for scheme A, when a sum of Rs 2800, is invested for “2X” years. स्कीम A में "X" वर्षों के लिए एक धन लगाया गया जो साधारण ब्याज प्रदान करता है। “X” वर्षों के बाद प्राप्त राशि योजना में निवेश की गयी राशि की दोगुना थी। योजना A से प्राप्त राशि क्या होगी, जब 2800 रुपये की राशि "2X" वर्षों के लिए निवेश की जाती है।

  1. 11200

  2. 5600

  3. 8400

  4. 9600

  5. None of these इनमें से कोई नहीं

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Let principal = P. After X years at simple interest, amount = 2P, so SI = P. This means r = 100/X%. For new investment: P = 2800, time = 2X years. SI = 2800 × (100/X) × 2X / 100 = 5600. Amount = 2800 + 5600 = 8400. Option C is correct.