SSC CGL 2020-21 Quantitative Aptitude Mensuration: Tips & Tricks

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Oct 16, 2020 Simran Nigam

Content Curator

Staff Selection Council (SSC) conducts Combined Graduate Level (CGL) entrance exam each year in order to recruit candidates in group B and C posts in various departments of Central government. Get SSC CGL 2020 latest News

• The exam comprises questions from:
1. Logical reasoning
2. General awareness
3. Quantitative aptitude
4. English language
• Quantitative aptitude in SSC CGL exam 2017 is very important and holds a weightage of 50 marks. It is a deciding area of the exam in the merit list.
• Mensuration is one among the important topics in quantitative aptitude in which candidates can score well with practice.
• Candidates should be able to solve these with accuracy and some tips and tricks are required for the same which have been mentioned in the article.

Know About  Detailed SSC CGL Exam Pattern

### SSC CGL Quantitative Aptitude Weightage Over the Years

Questions for Quantitative aptitude comprise a substantial portion in SSC CGL exam. Just like logical reasoning, it has a weightage of 50 marks. Weightage of different topics in SSC CGL over the years has been tabulated below:

Topic Weightage (Number of questions) Topic Weightage (Number of questions)
Simplification 1-2 Profit and loss 1-2
Interest 1-2 Number series 0-1
Percentage 0-1 Number system 1-2
Ratio and Proportion 1-2 Mensuration 2-3
Average 0-1 Data interpretation 0-3
Problems on ages 0-1 Time and Work 1-2
Geometry 3-4 Trigonometry 2-3
Speed time and distance 1-2 Algebra 2-3

The table provides a fair idea regarding the weightage of quantitative aptitude questions in previous years and one can expect the similar weightage in SSC CGL exam 2017 as well.

Check SSC CGL 2020-21 Syllabus

### SSC CGL Quantitative Aptitude Mensuration Tips and Tricks

In order to secure good marks in quantitative aptitude, candidates can follow the tips and tricks mentioned below.

• Time Management

As one knows, mensuration is all about calculations, so one should be extremely good with calculations and remember all tables, square roots, cube roots and avoid spending so much time on them.

• Basics come first

It is important that one is aware of all the basics of different chapters. One should memorize all basic theories and formulas and solve questions using them. Avoid opting for shortcut methods.

• Create summary notes

One is advised to make concise notes with keywords of important things taught in the exam and practice them regularly.

• Apply shortcut tricks in the right manner and only if you are comfortable. This will save you time and maintain speed.
• Practice more and more that you gain speed and accuracy and develop an understanding. You must practice from last year’s question papers and mock papers.

Also, Know How to prepare Logical Reasoning for SSC CGL 2020-21

### SSC CGL Quantitative Aptitude Mensuration Challenges faced by Students

Students go through quite a lot many difficulties during an exam and the list of challenges faced by students while appearing for SSC CGL exam is as follows:

• Time Management is one of the major challenges faced by candidates.
• The time limit for SSC CGL has been reduced from 75 minutes to 60 minutes.
• Students tend to overburden themselves by taking up topics or questions in the last few days which they have never practised.
• Candidates shall adopt methods that simplify learning their formulas since they face difficulty in it.

### SSC CGL Quantitative Aptitude Mensuration Sample Questions

Sample questions of quantitative aptitude, mensuration have been mentioned below:

Question 1. The length of a rectangular plot is 20 m more than its breadth. If the cost of fencing the plot @ Rs. 26.50 per meter is Rs. 5300, what is the length of the plot?
Sol. Cost = Rate × Perimeter
⇒ Perimeter = 5300/26.50 = 200
⇒ 2 (L + B) = 200
⇒ 2 (L + L – 20) = 200
⇒ L – 10 = 50
⇒ L = 60 m

Question 2. The length and breadth of the floor of the room are 20 by 10 feet respect. Square tiles of 2 feet are to be laid. Black tiles are laid in first row on all sides, white tiles on 1/3rd of remaining sides and blue tiles on the rest. How many blue tiles are required?
Sol:- Side of a tile = 2 feet ⇒ Area of 1 tile = 22 = 4 sq ft. ----- (1) Length left after lying black tile on 4 sides = 20 – 4

⇒ Area left after black tiles = (20 – 4)×(10-4) = 96 sq. ft.
Area left after white tiles = 2/3×96 =  64 sq. ft.
⇒ Area for blue tiles = 64 sq. ft.
Number of blue tiles = 64/4 = 16   (using 1)

Question 3. A cow is tethered in the middle of the field with a 14 ft long rope. If the cow grazes 100 sq. ft. per day, then the approximate time is taken to graze the whole field?
Sol: Here, the rope of cow is like radius Area = π (14)2

No. of days = (Area of field)/Rate of cow = π (14)2/100 = 6 days(approx)

Question 4. A circle and a rectangle have the same perimeter. Sides of the rectangle are 18 by 26 cm. What is the area of the circle?
Sol:-  2πr = 2 (18 + 26) ⇒ r = 14 cm
Area = π r2 = 616 cm2

Question 5. What will be the ratio between the area of a rectangle and the area of a triangle with one of the sides of the rectangle as the base and a vertex on the opposite side of the rectangle?
Sol:- Area of triangle = ½ × L × B

Area of rectangle = L × B
Area of a rectangle: area of a triangle = L × B: ½ × L × B = 2: 1