A sum of money doubles itself in 20 years in simple interest. Then the rate of intrest per annum is

  • 4.5 PERC
  • 5.5 PERC
  • 4 PERC
  • 5 PERC

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Rs. 800 becomes Rs. 956 in 3 years at certain simple rate of interest. If the rate of interest is increased by 4 PERC, what amount will Rs. 800 become in 3 years?

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A sum of money doubles itself in 20 years in simple interest. Then the rate of intrest per annum is
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