Question

If the cost of 37pens and 53pencils together cost rupees 320,while 53pens and 37pencils together cost rupees 400.Find the cost of two pens.
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Answer 1

Answer:

cost of two pens = Rs. 13

Step-by-step explanation:

• Let the cost of 1 pen = Rs. x
• Let the cost of 1 pencil = Rs. y

So, cost of 37 pen and 53 pencil= 320

37x + 53y = 320. - (I)

similarly,. 53x + 37y = 400. -(I)

On substituting the equations, we get

x = 13/2, y= 5/2

Now, cost of 2 pens = 2x cost of 1 pen

= Rs. 13

Answer 2

Answer:

cost of 2 pens =13 rupees

step by step explanation:-

spouse that cost of 1 pen=x rupees

and cost of 1 pencils= y rupees

37pens=37x

53pencil=53y

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

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

eque. for 1

53y=320-37x

y=320-37x/53

y ka man eque. n. 2 me

53x+37(320-37x/53)=400

53x+37(320-37x/53)=400

2809x+11840-1369x=21200

1440x=9360

x=9360/1440

x=6.5

x Ka value equation 1 me put up Marne Pe

37x+53y=320

37*6.5+53y=320

240.5+53y=320

53y=320-240.5

53y=79.5

y=79.5/53

y=1.5

cost of 1 pen=6.5

so cost of 2 pen =2*6.5

cost of 2 pens=13 rupees ANSWER