8th Class Mathematics Sample Paper Mathematics Sample Paper - 3

  • question_answer The cost of a notebook is Rs. 10. Draw a graph after making a table showing cost of 2, 3, 4... notebooks. Use it to find
    (a) the cost of 7 notebooks.
    (b) the number of notebooks that can be purchased for Rs. 50.

    Answer:

    Let x: number of notebooks
    y: cost of a notebook
    x 1 2 3 4 5 6 7 8
    y 10 20 30 40 50 60 70 80
    (a) The cost of 7 notebooks is equal to the coordinate of the point (7, 70), i.e. cost of 7 notebooks = Rs. 70
    (b) The number of notebooks that can be purchased for Rs. 50 is equal to the abscissa of the point (5, 50).
    Hence, 5 notebooks can be purchased for Rs. 50.


adversite


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