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Rachit Ahuja
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Asked: 2020-12-27T04:04:32+00:00 In:

In a class test, the sum of Shefali’s marks in Mathematics and English is 30. Had she got 2 marks more in Mathematics and 3 marks less in English, the product of their marks would have been 210. Find her marks in the two subjects.

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NCERT Solutions for Class 10 Maths Chapter 4
Important NCERT Questions
Quadratic Equation
NCERT Books for Session 2022-2023
CBSE Board and UP Board Others state Board
EXERCISE 4.3
Page No:88
Questions No:5

2020-2021cbsechapter 4class10mathematicsncertquadratic equation
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    2 Answers

    1. Best Answer

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    2. Let,
      Marks in maths=x
      Marks in english=y

      So,
      x+y=30———(I)

      2 more marks in maths =x+2
      3 less marks in english=y-3
      Product of two no. (x+2)(y-3)

      So,
      (x+2)(y-3)=210
      xy-3x+2y-6=210
      xy-3x+2y=216—————(II)

      Solve these two equation by subsitution method……..

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