Question

the cost of 18 pens are =200. find the cost of 20 pens​

Answer 1

Answer:

Step-by-step explanation:

Cost of 18 pens = 200

Let cost of 20 pens be x

Pens               Cost

18         =          200

20         =           x

18x = 200 x 20

18x = 4000

x = 4000 / 18

x = 222.222....

We will get a recurring decimal number because 18 is a multiple of 3.

Even if you first find the C.P of 1 pen, the answer will be recurring because you will have to do 200/ 18.

Hope the answer is correct.

Answer 2

Answer:

The cost of 20 pens is 222.20 .

Step-by-step explanation:

Given information,

the cost of 18 pens is 200

We have to find out the cost of 20 pens

As,

The cost of 18 pens = 200

The cost of 1 pen = $\frac{the \: cost \: of \: 18\: pens }{18}$

The cost of 1 Pen $= \frac{200}{18}$

By dividing 200 by 18 we get

The cost of 1 pen = 11.11

The cost of 20 pens = The cost of 1 pen × 20

The cost of 20 pens = $11.11 \times 20$

The cost of 20 pens = $222.20$

Hence,

The cost of 20 pens is 222.20 .