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      Question

      A sum of money triples itself in 12 years. Find

      the rate percent per annum.
      A 14%p.a. Correct Answer Incorrect Answer
      B 16.50% p.a. Correct Answer Incorrect Answer
      C 16.66%p.a. Correct Answer Incorrect Answer
      D 18%p.a. Correct Answer Incorrect Answer

      Solution

      Let the Principal = Rs 100 Amount = Rs 300 [if gte msEquation 12]>⇒ [if !msEquation]-->[endif]-->Amount = P + I [if gte msEquation 12]>⇒ [if !msEquation]-->[endif]-->300 = 100 + I I = 300 – 100 = Rs 200 [if gte msEquation 12]>⇒ [if !msEquation]-->[endif]-->R = `(SI xx 100)/(Pxx T)` [if gte msEquation 12]> SI ×100 P × T [if !msEquation]-->[endif]--> ⇒ `(200 xx 100)/(100xx 12)` [if gte msEquation 12]> 200  ×  100 100  ×  12 [if !msEquation]-->[endif]--> [if gte msEquation 12]>∴ [if !msEquation]-->[endif]--> R = 16.66% p.a.

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