NCERT Solutions For Class 10 Maths Chapter 3 Exercise 3.5
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NCERT Solutions for class 10 Maths Chapter 3 Exercise 3.5 pair of linear equations in two variables in PDF form modified as per latest NCERT/CBSE Curriculum 2020-21 free to download or use online for users.
Important Extra Questions With Answers
1. Solve the pair of linear equations: 152x – 378y = – 74; – 378x + 152y = – 604. [Answer: 2, 1]
2. Pinky scored 40 marks in a test getting 3 marks for each right answer and losing 1 mark for each wrong answer. Had 4 marks been awarded for each correct answer and 2 marks were deducted for each wrong answer, then Pinky again would have scored 40 marks. How many questions were there in the test? [Answer: 40]
3. A fraction is such that if the numerator is multiplied by 2 and the denominator is increased by 2, we get 5/4. But if the numerator is increased by 1 and the denominator is doubled, we get 1/2. Find the fraction. [Answer: 5/6]
4. A two digit number is obtained by either multiplying sum of digits by 8 and adding 1 or by multiplying the difference of digits by 13 and adding 2. Find the number. [Answer: 41]
5. The sum of the numerator and denominator of a fraction is 4 more than twice the numerator. If the numerator and denominator are increased by 3, they are in the ratio 2:3. Determine the fraction. [Answer: 5/9]
Questions From CBSE Examinations
1. Father’s age is three times the sum of ages of his two children. After 5 years his age will be twice the sum of ages of two children. Find the age of the father. [Answer: 45 years]
2. Five years ago, A was thrice as old as B and ten years later A shall be twice as old as B. What are the present ages of A and B? [Answer: A = 50 years, B = 20 years]
3. On selling a T.V. at 5% gain and a fridge at 10% gain, a shopkeeper gain ₹ 2000. But if he sells the T.V. at 10% gain and fridge at 5% loss, he gains ₹ 1500 on the transaction. Find the actual price of the T.V. and the fridge. [Answer: TV = ₹20222, Fridge = ₹10000]
4. Father’s age is 3 times the sum of ages of his two children. After 5 years, his age will be twice the sum of the ages of two children. Find the age of father. [Answer: 45 years]
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