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The cost of one pencil, two pens and four erasers is Rs.22 while the cost of five pencils, four pens and two erasers is Rs.32.How much will three pencils, three pens and three erasers cost?

  
Total Answers and Comments: 2 Last Update: July 16, 2008     Asked by: guhan 
  
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 Best Rated Answer
Submitted by: Kayalvizhi
 

Let a, b, and c denote pencil, pen and eraser respectively.

Given that the cost of one pencil, two pens and four erasers is Rs.22

This can be written as,

        a + 2b + 4c = 22 ..........(1)

Similarly, the cost of 5 pencils, 4 pens and 2 erasers is Rs. 32

This implies ....

        5a + 4B + 2c = 32 ......... (2)

Adding (1) and (2), we get

        6a + 6b + 6c = 54

We need to find the value of 3a + 3b + 3c.

Dividing by 2, we get

        3a + 3b + 3c = 27.

Hence, the cost of 3 pencils, 3 pens, and 3 erasers is Rs.27

     



Above answer was rated as good by the following members:
Prashant202185, raj_ku_Yad
October 03, 2006 18:44:16   #1  
Kayalvizhi        

RE: The cost of one pencil, two pens and four erasers ...

Let a b and c denote pencil pen and eraser respectively.

Given that the cost of one pencil two pens and four erasers is Rs.22

This can be written as

a + 2b + 4c 22 ..........(1)

Similarly the cost of 5 pencils 4 pens and 2 erasers is Rs. 32

This implies ....

5a + 4B + 2c 32 ......... (2)

Adding (1) and (2) we get

6a + 6b + 6c 54

We need to find the value of 3a + 3b + 3c.

Dividing by 2 we get

3a + 3b + 3c 27.

Hence the cost of 3 pencils 3 pens and 3 erasers is Rs.27


 
Is this answer useful? Yes | NoAnswer is useful 2   Answer is not useful 0Overall Rating: +2    
July 16, 2008 01:58:51   #2  
sreeramdesikan Member Since: July 2008   Contribution: 1    

RE: The cost of one pencil, two pens and four erasers is Rs.22 while the cost of five pencils, four pens and two erasers is Rs.32.How much will three pencils, three pens and three erasers cost?
Rs.27
Add both the equation and divide the result by 2...

 
Is this answer useful? Yes | NoAnswer is useful 1   Answer is not useful 0Overall Rating: +1    

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