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 pen


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Answer 1

Answer:

Let cost of a pen = x

Cost of a pencil = y

According to ques..

Case 1 :

37x + 53y = 320 ....(1)

Case 2 :

53x + 37y = 400 ...(2)

Add(1) and (2), we get

90x + 90 y = 720

=> x + y = 8 .... (3)

Subtract (1) from (2). We get

16x - 16y = 80

=> x - y = 5 ....(4)

Add (3) and (4)

2x = 13

x = 6.5

So y = 1.5

Cost of pen = Rs. 6.5

Cost of pencil = Rs 1.5