Analytical Geometry> The total cost of six books,five pencils ...

The total cost of six books,five pencils and seven sharpeners is rs 115 and that eight books ,ten pencils and fourteen sharpeners is Rs 190,then which of the following article`s cost can be found uniquely?(a)book (b)pencil(c)sharpeners(d)none of these ...please give me answer clearly

Anand kumar , 8 Years ago

Grade 10

1 Answers

manna

Last Activity: 8 Years ago

lets say b=books,p=pencils,s=sharpeners

according to question

6b+5p+7s=115-------------------------1

8b+10p+14s=190-------------------2

in eq 2 divide both side by 2

4b+5p+7s=95------------------3

substract both eq 1 and 3

we will get 2b=20

b=10

mean single book cost is 10 rs.

answer is book

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Analytical Geometry> The total cost of six books,five pencils ...

The total cost of six books,five pencils and seven sharpeners is rs 115 and that eight books ,ten pencils and fourteen sharpeners is Rs 190,then which of the following article`s cost can be found uniquely?(a)book (b)pencil(c)sharpeners(d)none of these ...please give me answer clearly

Anand kumar , 8 Years ago

manna

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