Simple interest on a certain sum of money for 3 years at 8% per annum is half the compound interest on Rs. 4000 for 2 years at 10% per annum. The sum placed on simple interest is

Rs 1650
Rs 1750
Rs 1850
Rs 1950

• let sum 4 simple interest = y
  y*3*8/100 = 1/2 [4000(1+ 10/100)^2 - 4000]
  = 1/2 * 4000 [121/100 - 1]
  = 2000* 21/100
  y=1750
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