Question

the cost of 4 pen and 4 pencil Rs100, 3 times the cost of a pen is Rs15 more than the cost of pencil. Find the cost of pen and pencil​

Answer 1

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Answer 2

Answer:

Let the cost of a pen and a pencil be Rs x and Rs y respectively.

According to the question,

4x + 4y = 100 Or

x + y = 25 …(i)

3x = y + 15 Or

3x-y = 15 …(ii)

On adding Equation (i) and (ii), we get,

4x = 40 so,

x = 10

Substituting x = 10, in Eq. (i) we get

y = 25-10 = 15

Hence, the cost of a pen = Rs. 10

The cost of a pencil = Rs.15

Step-by-step explanation:

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