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  • Question
  • Both S.I. and C.I. is calculated with a similar rate of 10% per annum on a sum of rupees. If C.I. is calculated yearly for two years, then for what period must S.I. be evaluated such that S.I. = C.I.?


  • Options
  • A. 4.2 years
  • B. 2.1 years
  • C. 1.1 years
  • D. 1.4 years

  • Correct Answer
  • 2.1 years 

    Explanation

    Let time period of S.I. be T years.

    Then for a principal amount, say P,

    ATQ, as, S.I. = C.I. for rate =10%p.a. and

    time for C.I. = 2(P x 10 x T)/100 = P{[ (100+10)/100 ]2-1}T/10 = [ 110/100 ]2?1 = [(11/10)2?1] = (121-100)/100T/10 = 21/100T = 21/10 = 2.1 years

  • Tags: Bank Exams, Bank PO, Bank Clerk

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