Math, asked by tahsinahmed47612, 1 month ago

If the cost of one notebook is twice the cost of one pen, then find the cost of one pen?
( The value of x = 20 and y = 10)

Answers

Answered by IIMrLegendII
19

QUESTION: If the cost of one notebook is twice the cost of one pen, then find the cost of one pen?

QUESTION: If the cost of one notebook is twice the cost of one pen, then find the cost of one pen?( The value of x = 20 and y = 10)

Answer:

Let the cost of a notebook be Rs.x and that of a pen be Rs.y.

Given that the cost of a notebook is twice the cost of a pen

Then,

x = 2y

or \: x - 2y = 0

Given

x = 20 \: and \: y = 10

So,

20 - 2 \times 10 = 0

20 - 20 = 0

0 = 0

HOPE IT HELPS✌

Answered by rahul123437
3

Unitary Method-Notebook, Pen

Given:

One notebook's cost is same as cost of two pens.

To Find:

Cost of one pen

Step-by-step explanation:

  1. For these type of question first we need to find the relation between the price of two things.
  2. Then if values are not given , then suppose the variables to be the price.
  3. Put it into equation.
  4. Find the value for one article.
  5. Use unitary method to find the value of N article as asked in question.

Let the cost of one notebook be x

Let the cost of one pen be y

According to question:

x=2 y

=>\frac{x}{2}=y

Its given that x=20, and y=10

So, this values get correct into the equation.

Hence, the cost of one pen will be 10 units (units is any currency).

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