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By mistake a clerk calculated the simple interest on principal for 5 months at 6.5 % per annum instead of 6 months at 5.5 % per annum if the error in calculation was 25.40 the originals sum is?
Most Upvoted Answer
By mistake a clerk calculated the simple interest on principal for 5 m...
By mistake clerk calculated , S.I as
p×5×6.5\12×100
which should be
p×6×5.5/12×100

ERROR in calculation was 25.40

Original sum of money=
6×5.5×p/12×100 - 5×6.5×p/12×100. = 25.40
33p-32.5p/1200 =25.40
0.5p =1200×25.40
p= 30480/0.5
p=60960
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By mistake a clerk calculated the simple interest on principal for 5 m...
Calculation of Original Sum


Given:


  • Principal was calculated for 5 months at 6.5% per annum instead of 6 months at 5.5% per annum.

  • Error in calculation was 25.40.



To find: Original sum (principal).


Formula Used

The formula for simple interest is:

Simple Interest = (P * R * T) / 100

where,


  • P = Principal

  • R = Rate of interest

  • T = Time in years



Solution

Let the original sum be 'P'.

According to the given data,


  • Principal was calculated for 5 months at 6.5% per annum.

  • Instead, it should have been calculated for 6 months at 5.5% per annum.

  • The error in calculation was 25.40.



Using the formula for simple interest, we can write:


Simple Interest = (P * R * T) / 100


For the incorrect calculation:



  • P = Principal calculated for 5 months at 6.5% per annum

  • R = 6.5/12 = 0.542% per month (monthly rate)

  • T = 5/12 years

  • Simple Interest = Error in calculation = 25.40



Substituting these values in the formula, we get:


25.40 = (P * 0.542 * 5/12) / 100


Solving for P, we get:


P = (25.40 * 100) / (0.542 * 5/12) = 9333.33 (approx.)


Therefore, the original sum (principal) is 9333.33 (approx.).


Explanation

The given problem involves finding the original sum (principal) when there is an error in the calculation of simple interest due to incorrect rate and time. To solve the problem, we use the formula for simple interest and substitute the given values to find the unknown value (principal). The solution involves algebraic manipulation and simplification of the formula to obtain the final answer. It is important to understand the formula and the given data to correctly solve the problem.
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By mistake a clerk calculated the simple interest on principal for 5 months at 6.5 % per annum instead of 6 months at 5.5 % per annum if the error in calculation was 25.40 the originals sum is?
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By mistake a clerk calculated the simple interest on principal for 5 months at 6.5 % per annum instead of 6 months at 5.5 % per annum if the error in calculation was 25.40 the originals sum is? for CA Foundation 2024 is part of CA Foundation preparation. The Question and answers have been prepared according to the CA Foundation exam syllabus. Information about By mistake a clerk calculated the simple interest on principal for 5 months at 6.5 % per annum instead of 6 months at 5.5 % per annum if the error in calculation was 25.40 the originals sum is? covers all topics & solutions for CA Foundation 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for By mistake a clerk calculated the simple interest on principal for 5 months at 6.5 % per annum instead of 6 months at 5.5 % per annum if the error in calculation was 25.40 the originals sum is?.
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