ArithmeticThe difference between the compound interest and simple interest on a certain sum at 15% per annum for 1½ year is Rs.112.5. Find the sum.

The difference between the compound interest and simple interest on a certain sum at 15% per annum for 1½ year is Rs.112.5. Find the sum.

  1. A

    20,000

  2. B

    15,000 

  3. C

    12,000

  4. D

    10,000

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    Solution:

    Solution: Let the sum be Rs ‘x’

    C.I=x×[115100]×[107.5100]x=x[115×107.51000010000]=0.23625xS.I=x×32×15100=45x200difference=0.23625x0.225x=112.50.01125x=112.5x=10000

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