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At simple interest, a sum of money doubles itself in 8 years. What is the rate of interest per annum?

1650Medium DSSSB TGT Computer Science 0 replies 1 views
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At simple interest, a sum of money doubles itself in 8 years. What is the rate of interest per annum?

  • A10%
  • B15%
  • C12.5%
  • D8%
Correct answer: C

Explanation

The interest in 8 years equals the principal, so 100 = R × 8 and R = 12.5% per annum.

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