Question

The cost of one pen is double the cost of one marker. If 10 pens and 5 markers cost $50 find the cost pf one pen? Please show the working as well.

Answer 1

Answer:

Let's the cost of one marker be n and cost of one pen be 2n [double of one marker]

• According to the Question :

⇢ 10 pens + 5 markers = $50

⇢ (10 × 2n) + (5 × n) = $50

⇢ 20n + 5n = $50

⇢ 25n = $50

⇢ n = $50 / 25

⇢ n = $2

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• Cost of one Pen :

⇒ Pen = 2n

⇒ Pen = 2 × $2

⇒ Pen = $4

∴ Hence, the cost of one pen is $4.