Maths : Algebra: Book Back, Exercise, Example Numerical Question with Answers, Solution: Exercise 3.13: Solving by Cross Multiplication Method

**Exercise 3.13**

**1. Solve by cross-multiplication method**

**(i) 8 x **

(i) 8*x* − 3*y* = 12 ; 5*x* = 2 *y* + 7

(ii) 6*x* + 7 *y* −11 = 0 ; 5*x* + 2 *y* = 13

(iii) 2/*x* + 3/*y* = 5 ; 3/*x* – 1/*y* + 9 = 0

**2. Akshaya has 2 rupee coins and 5 rupee
coins in her purse. If in all she has 80 coins totalling ₹ 220, how many coins of
each kind does she have.**

**3. It takes 24 hours to fill a swimming
pool using two pipes. If the pipe of larger diameter is used for 8 hours and the
pipe of the smaller diameter is used for 18 hours. Only half of the pool is filled.
How long would each pipe take to fill the swimming pool.**

Tags : Solving simultaneous linear equations in Two Variables | Numerical Problems with Answers, Solution | Algebra | Maths , 9th Maths : UNIT 3 : Algebra

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9th Maths : UNIT 3 : Algebra : Exercise 3.13: Solving by Cross Multiplication Method | Solving simultaneous linear equations in Two Variables | Numerical Problems with Answers, Solution | Algebra | Maths

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