Multiple choice

Rs.500 was invested at 12 % per annum simple interest and a certain sum of money invested at 10% per annum simple interest. If the sum of the interests on both the sums after 4 years is Rs.480, find the later sum of money? 500 रु की राशि 12% के वार्षिक साधारण ब्याज पर निवेश की जाती है और कुछ और राशि भी 10% की वार्षिक साधारण ब्याज पर निवेश की जाती है. दोनों राशि के ब्याज का योग 4 वर्ष बाद 480 रु है. तो बाद वाली राशि क्या थी?

  1. Rs.450

  2. Rs.750

  3. Rs.600

  4. Rs.550
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C Correct answer
Explanation

Interest from first sum: P = 500, R = 12%, T = 4 years. SI = (500 × 12 × 4)/100 = Rs. 240. Total interest = Rs. 480, so interest from second sum = 480 - 240 = Rs. 240. For second sum: SI = 240, R = 10%, T = 4. So P = (240 × 100)/(10 × 4) = Rs. 600.

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