RS Aggarwal Solutions Class 7 Chapter-20 Mensuration (Ex 20A) Exercise 20.1 - Free PDF
FAQs on RS Aggarwal Solutions Class 7 Chapter-20 Mensuration (Ex 20A) Exercise 20.1
1. Solve the Problem, Where the Area of a Rectangular Field in Hectares Whose Dimensions are 125 Metres and 400 Metres.
The set of given dimensions in the problem are- length equals 125 metres, and breadth equals 400 metres.
The given length of the rectangular field is 125 metres, and the breadth of the rectangular field is 400 metre. The formula to calculate the area of the rectangular field is the length multiplied by the breadth, that is, 125 metres x 400 metres, which equals to 50000-metre square, which amounts to 5 hectares (Since 10000-metre square is equal to 1 hectare).
2. Calculate the Cost of the Painting of the Wall if the Dimensions of the Door are 3-Metre x 2 Metre and 10 Metres x 10 Metres and at the Rate of the Painting is Rs 2.50 per sq. m
The given dimensions are- length and breadth of the door and side of the wall.
To calculate the area of the square is (side) square and the area of the wall is side multiplied by the side, that is, 10 m x 10 m= 100-m².
To calculate the area of the rectangle is length multiplied by the breadth and the area of the door is length x breadth, that is, 3-metre x 2 metres = 6 metres. Thus, the area of the wall for painting = the area of the wall minus the area of the door, that is, 100 – 6 m² = 94-m². The rate of the painting per square metre equals to Rs. 2.50. Hence, the cost of painting the wall is Rs. 94 x 2.50 = Rs. 235.
3. What is the weightage of Mensuration?
In the annual examination, the Chapter Mensuration from RS Aggarwal Class 7 Chapter 20 Ex holds a weightage of 2 marks questions for simple answers and three and five marks questions for extensive problems. Students must have an elementary knowledge about the formulas, critical topics and theorems; it helps students secure better marks in the annual examination. Solutions of the same are available on the Vedantu website to download.
4. Benefits of using Vedantu’s RS Aggarwal Solutions?
RS Aggarwal Solutions Class 7 Ex 20A is a reliable and comprehensive study that presents students with a fundamental understanding of the Chapter Mensuration in a simple step-by-step explanation. A thorough comprehension of the formulas under this Chapter can help students secure a better aggregate in their annual examinations. Students can understand the appropriate method that helps them understand and solve their respective exercise questions. To get more benefits, join the Vedantu Maths online tuition Class.
5. What is the importance of the Mensuration Chapter of Class 7?
Mensuration is the branch of Mathematics that teaches you how to find the Area and circumference of the different two-dimensional figures like Rectangles, Squares and many more. It is applicable in many different fields and day to day life activities. In higher Classes, you will deal with complex figures there you will find how helpful these concepts are to solve problems.
6. What are the topics included in Chapter 20 of RS Aggarwal?
The RS Aggarwal Class 7 Chapter 20 is a short Chapter that deals with Mensuration and comprises essential topics such as,
Units of measurement of the Area- In this sub-topic, fundamental concepts such as Square millimetre, Square centimetre, Square decimeters, Square meter, Hectare, and Square kilometres.
Perimeter and Area of Squares and Rectangles
Area of the Parallelograms, and
Area of Triangle in the Parallelogram
The RS Aggarwal Class 7 Chapter 20 Ex A has a total of ten solved questions that briefs students about the Perimeter and Area of a Rectangle concisely and comprehensively. The solutions also comprise questions about the calculations missing the Breadth and Length in a Rectangle.
7. What is the difference between Parallelogram and Rectangle?
Both Rectangles and Parallelograms have the same number of sides, and their opposite sides are always equal in Length. Rectangles are Parallelograms, but not all Parallelograms are Rectangles. Diagonals of the Rectangles are of equal Length, but diagonals of the Parallelograms are of unequal Length. And most important, the Rectangle has 90-degree angles which is not the case with Parallelograms.
