Math formulas

गणित स्पेशल
=========
☞ द्विआयामी आयत/वर्ग/व़त्त :::
►वर्ग
•क्षेत्रफल = भुजा²
•परिमाप = 4 x भुजा
•विकर्ण = भुजा√ 2
.
►आयत
•क्षेत्रफल = लंबाई x चौडाई
•परिमाप = 2(लंबाई + चौडाई)
•विकर्ण = √ (लंबाई² +चौडाई²)
.
►व़त्त
•क्षेत्रफल = πr² (आंतरिक भाग)
•परिधी = 2πr (बाहरी भाग)
.
☞ त्रिआयामी आयत/वर्ग/व़त्त :::
►घन
•आयतन = भुजा³ (आंतरिक भाग)
•वक्रप़ष्ठ = 6भुजा² (बाहरी भाग)
•विकर्ण = भुजा√ 3
.
►घनाभ
•आयतन = लंबाई x चौडाई x उंचाई (आंतरिक भाग)
•वक्रप़ष्ठ = 2(lb+bh+hl) (बाहरी भाग)
•विकर्ण = √ (लंबाई² + चौडाई² + उंचाई²)
.
►गोला
•वक्रप़ष्ठ = 3πr² (बाहरी भाग)
•आयतन = (4/3)πr³ (आंतरिक भाग)
.
बेलन
वक्रप़ष्ठ = 2πrh (बाहरी भाग)
संपूर्ण प़ष्ठ = 2πr(h+r)
आयतन = πr²h (आंतरिक भाग)
.
►शंकु
• आयतन =(1/3)πr²h
• क्षेत्रफल = πr(r+s)
.
☞ त्रिभुज :::
►समबाहु :- सभी भुजाएं बराबर
•क्षेत्रफल = (√ 3)/4 x भुजा²
.
►समद्विबाहु :- कोई भी दो भुजा बराबर
क्षेत्रफल = 1/2 x आधार x उंचाई
.
►विषमबाहु :- सभी भुजाएं असमान
•परिमिती = (a+b+c)/2
•क्षेत्रफल = √ [s(s-a)(s-b)(s-c)]
.
☞ चतुर्भुज :::
►समचतुर्भुज :- सभी भुजाएं बराबर और एक दुसरे के समांतर
•क्षेत्रफल = 1/2 ( विकर्ण1 x विकर्ण2)
.
►समलंब समचतुर्भुज :- आमने -सामने कि कोई भी दो भुजा समांतर
•क्षेत्रफल = 1/2 ( समांतर भुजाओं का योग)x उंचाई
.
►समांतर समचतुर्भुज :- कोई भी दो भुजा बराबर
•क्षेत्रफल = आधार x उंचाई.

Simple Interest

Hello friends & Very good morning!!!

Today we are going to see chapter Simple Interest which some of us finds very simple chapter but as everything of this chapter is related or wondering around a single simple formula, namely

             P X R X N

SI = ------------------------

                 100

Ratio & Proportion

Hello friends…

Today we are going to learn about Ratios & Proportion. Generally all kinds of problems or all other topics under QA has something to do with this chapter.

Average

 
Hello friends...

Today we are not going much details in the topic of average.

Simplification Part 3 : Decimal To Fractions & Their Operations

Hello friends,

Today we are going to learn 3^rd part of simplification, in which we are going to continue decimal to fractions section.

In last post, we got what are the different types of decimals & what makes them different. Also n/(3,4,5,6,7,8,9,&11). If you didn’t get that you can click on link to continue, don’t bother they are part of mind tricks so it’ll take just 5 minutes.

So, After learning types of decimals we must know how to convert them into fractions. Since if you convert decimals to fractions, you can cancel those fractions with multiplicands.

Example: 22  x 0.34 = 22 X 34/99 = 2 x 34/9 = 7.5

I have short cut for this also, 22 x .34 = 11 x 2 x .34 = 11 x .68 = 6 | 6+8 | 8 = 7.48…This it trick of multiplication with 11. Stay tuned to learn this in upcoming posts.

Simplification Tricks By Vikas Ghode Part 1

Hello, Friends...

Today we are going to learn some simple but very effective techniques for solving Simplification examples. As always these tricks are not always effective on every example as bank exam paper setters are very good than we think.

Simplification Tricks By Vikas Ghode Part 2

Hello friends

Today we are going to learn many simple tricks for simplifications

So let’s start