# Simple and Compound Interest Formula

## Simple and Compound Interest Formula

P - Principal, the sum of money lent or borrowed.

R - Rate of interest: Annual interest, often expressed as a percentage.

T - Time period for which the money is lent or borrowed.

Simple Interest = Principal * Time * Rate of interest / 100

SI = P * T * R

For example, Principal is 4000, Rate of Interest is 8% and Time period is 4 years

SI = 4000× 8% × 4 =  4000× 0.08 × 4

= 1280.

In compound interest, the principal amount with interest after the first time period becomes the part of principal for the next time period.

CI =   [P (1 + R/100)^T] – P

Total amount = [P (1 + R/100)^T]

If time period is half-yearly,

Amount = P[1 + (R/2)/100]^2T

If time period is quarterly,

Amount = P[1 + (R/4)/100]^4T

For example,   Principal is 7500, Rate of Interest is 4% (compounded annually) and Time period is 2 years

Total Amount = [7500×(1+4/100)^2] = 8112.

CI = (8112 - 7500) = 612.

Ranks in the Army

കരസേനയിലെ റാങ്കുകൾ.  Code: ജലജ മേജർ ജനറലിനോട് ബിയറിനായി കേണു എൽ സി.ക്ക് മേജറിന്റെ ക്യാപ് ലഭിച്ചു. .

1. ജ : ജനറൽ.

2. ലജ : ലഫ്. ജനറൽ.

3. മേജർ ജനറൽ : മേജർ ജനറൽ.

4. ബിയർ : ബ്രിഗേഡിയർ.

5. കേണു : കേണൽ.

6. L. C : ലഫ്.കേണൽ.

7. മേജർ : മേജർ.

8. ക്യാപ് : ക്യാപ്ടൺ.

9. ലഭിച്ചു : ലഫ്റ്റനന്റ്.

ഇന്ത്യൻ കരസേനയുടെ ഗാനം: മേരാ ഭാരത് മഹാൻ.
ഇന്ത്യൻ സായ...

Tricks and Tips for Boat and Stream type Questions

Shortcut tricks on boats and streams are one of the most important topics in exams. These are the formulas and examples on Boats and Streams (Cyclist and the wind or Swimmer and stream) questions. These examples will help you to better understand shortcut tricks on boats and streams questions.

There are multiple types of questions asked from these topics. The speed of the boat in still water and the speed of stream will give in questions, You have to find the time taken by boat to go upstream and downstream. .
The speed of the boat in up and down stream will give in question,  you need to find the average speed of the boat.
The speed of boat to go up or down the stream will give in question, you need to find speed of boat in still water and speed of stream.
The time taken by boat to reach a place in up and downstream will given in question, you need to find the distance to the place.

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Important Maths Formulas ( പ്രധാനപ്പെട്ട ഗണിത സൂത്രവാക്യങ്ങൾ )

Important Maths Formulas .

(a ± b) 2 = a 2 ± 2ab + b 2 .

(a + b + c) 2 = a 2 + b 2 + c 2 + 2(ab + bc + ca).

(a + b + c + d) 2 = a 2 + b 2 + c 2 + d 2 + 2(ab + ac + ad + bc + bd + cd) .

Geometry formulas .

Perimeter ( ചുറ്റളവ് ) .

Perimeter of a square: P=4a.

a: length of one side.

Perimeter of a rectangle: P=2(l+w).

l: length.

w: width.

Perimeter of a triangle: P=a+b+c.

a, b, and c: lengths of the 3 sides.

Area ( വിസ്തീര്‍ണ്ണം ) .
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