2. Questions Bank
  3. 8th Class
  4. Mathematics
  5. Algebraic Expressions

8th Class Mathematics Algebraic Expressions Question Bank Algebra

  • question_answer
    How old is a man now who, 20 years ago, was five times as old as his son who will be 41 years old 16 years after?

    A) 40 years                      

    B) 45 years

    C) 48 years                      

    D) 50 years

    Correct Answer: B

    Solution :

    Let father and son be x years and y years old now. \[(1,2)\] \[x-20=(y-20)\times 5\] \[P(x)={{a}_{0}}+{{a}_{1}}x+{{a}_{2}}{{x}^{2}}+.....+{{a}_{n}}{{x}^{n}}\]\[x-5y=-80\]   ?(1) And \[y+16=41\]\[\Rightarrow \]\[y=25\]                              ?(2) From equations (1) and (2) \[-9,\frac{15}{4},\frac{-13}{3}\]


You need to login to perform this action.
You will be redirected in 3 sec spinner