Question

The price of 10 pencils is equal to that of 4 pens. The price of 15 pencils and 2 pens together is Rs. 4000. The total price of 12 pencils and 3 pens is equal to

Answer 1

Answer:

Cost of 12 pencils and 3 pens will be 3900 rupees.

Step-by-step explanation:

Let the cost of one pencil be x

And that of one pen be y

According to the question

10 x = 4 y and                                   ........(1)

15 x + 2 y = 4000                             .........(2)

From equation (1) we can say that

2 y = 5 x

Putting this value in equation (2)

15 x + (5 x) = 4000

=> 20 x = 4000

Therefore x = 200

Putting value of x in eq. (1)

10 (200) = 4 y

=> 2000 = 4 y

Therefore y = 500

Now cost of 12 pencils and 3 pens will be

= 12 x + 3 y = 12(200) + 3 (500)

=3900

Answer 2

Answer:

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Step-by-step explanation:

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