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The cost of a note book is Rs 10. Draw a graph after making a table showing cost of 2, 3, 4, .... note books. Use it to find the cost of 7 notebooks.

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प्रश्न

The cost of a note book is Rs 10. Draw a graph after making a table showing cost of 2, 3, 4, .... note books. Use it to find

  1. the cost of 7 notebooks. 
  2. the number of note books that can be purchased with Rs 50.
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उत्तर

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 aqua to the ordinate of the point (7, 70), i.e. cost of 7 notebooks = Rs 70

b. The number of notebooks that can be purchased with Rs 50 is equal to the abscissa of the point (5, 50).

Hence, 5 notebooks can be purchased with Rs 50.

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अध्याय 12: Introduct To Graphs - Exercise [पृष्ठ ३८०]

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एनसीईआरटी एक्झांप्लर Mathematics Exemplar [English] Class 8
अध्याय 12 Introduct To Graphs
Exercise | Q 46. | पृष्ठ ३८०

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