Question

If the cost of 37 pens and 53 pencild is 320 and 37 pencils and 53 pens together cost 400Rs. The cost of 2 pens.


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Answer 1

Answer:

13

Step-by-step explanation:

Let the cost of 1 pen be x

And, cost of 1 pencil be y

therefore,

37x+53y=320

53x+37y=400

Or, (by elimination method)

53×37x+53y=320

37×53x+37y=400

Or,

1961x+2809y=16960

1961x+1369y =14800

or,

1440y=2160

or, y=3/2=1.5

37x+53×1.5=320

37x =320-79.5

x =240.4/37=6.5

therefore, cost of 1.pen=Rs. 6.5

cost of 2 pens=6.5×2=13rs

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