# NCERT Solutions For Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.1

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Textbook | NCERT |

Board | CBSE |

Category | NCERT Solutions |

Class | Class 10 |

Subject | Maths |

Chapter | Chapter 3 |

Exercise | Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables Exercise 3.1 |

Number of Questions Solved | 3 |

## NCERT Solutions for Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.1

**NCERT TEXTBOOK EXERCISES**

**Ex 3.1 Class 10 Question 1. Aftab tells his daughter, “Seven years ago, I was seven times as old as you were then. Also, three years from now, I shall be three times as old as you will be.” (Isn’t this interesting)? Represent this situation algebraically and graphically.**

**Solution:**

Let present age of Aftab = x years and present age of Aftab’s daughter = y years.

**1st Condition :**Seven years ago

x – 7 = 7(y – 7)

⇒ x – 7 = 7y – 49

⇒ x – 7y = – 42

**Table :**

**2nd Condition :**Three years later,

x + 3 = 3(y + 3)

x + 3 = 3y + 9

x – 3y = 6

**Table :**

Thus, the algebraic equations are

x – 7y + 42 = 0 and x – 3y – 6 = 0

**Math Class 10 Ex 3.1 Question 2. The coach of a cricket team buys 3 bats and 6 balls for ₹ 3900. Later, she buys another bat and 3 more balls of the same kind for ₹ 1300. Represent this situation algebraically and geometrically.**

**Solution:**

Let cost of one bat = ₹ x

and the cost of one ball = ₹y**A.T.Q.****1st Condition :**3x + 6y = 3900

**Table :**

**2nd Condition :**

x + 3y = 1300**Table :**

Thus, the algebraic equations are 3x + 6y = 3900 and x + 3y – 1300

**Class 10 Maths Chapter 3 Question 3. The cost of 2 kg of apples and 1 kg of grapes on a day was found to be ₹ 160. After a month, the cost of 4 kg of apples and 2 kg of grapes is ₹ 300. Represent the situation algebraically and geometrically.**

**Solution:**

Let cost of one kg of apples = ₹ x and the cost of one kg of grapes = ₹y

**A.T.Q.****1st Condition :**

2x + y = 160**Table :**

**2nd Condition :**

4x + 2y = 300**Table :**

Thus, algebraic situations are 2x + y = 160 and 4x + 2y = 300

## NCERT Solutions for Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables Exercise 3.1 PDF

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### Other Chapter of Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables

**Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.1****Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.2****Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.3****Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.4****Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.5****Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.6****Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables Ex 3.7**