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RBSE Solutions for Class 9 Maths Chapter 3 Coordinate Geometry Ex 3.1

April 16, 2022 by Fazal Leave a Comment

Rajasthan Board RBSE Solutions for Class 9 Maths Chapter 3 Coordinate Geometry Ex 3.1 Textbook Exercise Questions and Answers.

RBSE Class 9 Maths Solutions Chapter 3 Coordinate Geometry Exercise 3.1

Question 1.
How will you describe the position of a table lamp on your study table to another person?
RBSE Solutions for Class 9 Maths Chapter 3 Coordinate Geometry Ex 3.1 1
Answer:
Consider the lamp as a point A and table as a plane.
Choose any two perpendicular edges of the table, say OX and OY. Measure the distance of the lamp, i.e. A from the longer edge OX, let it be 20 cm. Again, measure the distance of the lamp A from the shorter edge OY, let it be 10 cm. Thus, the position of the lamp P referred to the edges OX and OY is (10, 20).

RBSE Solutions for Class 9 Maths Chapter 3 Coordinate Geometry Ex 3.1

Question 2.
(Street Plan) : A city has two main roads which cross each other at the centre of the city. These two roads are along the North- South direction and East-West direction. All the other streets of the city run parallel to these roads and are 200 m apart. There are 5 streets in each direction. Using 1 cm = 200 m, draw a model of the city on your notebook. Represent the roads/streets by single lines.
RBSE Solutions for Class 9 Maths Chapter 3 Coordinate Geometry Ex 3.1 2
There are many cross-streets in your model. A particular cross-street is made by two streets, one running in the North- South direction and another in the East-West direction. Each cross street is referred to in the following manner : If the 2nd street running in the North-South direction and 5th in the East-West direction meet at some crossing, then we will call this cross-street (2, 5). Using this convention, find :
(i) how many cross-streets can be referred to as (4, 3).
(ii) how many cross-streets can be referred to as (3, 4).
Answer:
Street plan is as shown in the figure:
(i) There is only one cross-street, which can be referred as (4, 3).
(ii) There is only one cross-street, which can be referred as (3, 4).

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