Question

1 dozen pens cost $20. how much will 20 pens cost?​

Answer 1

Here, as per the provided question we are asked to find the cost of 20 Pens ·—

GIVEN :

• One dozen pen costs = $20

TO FIND :

• 20 Pens will cost = ? [ when 1 pen cost $20]

STEP-BY-STEP EXPLANATION :

Now, we have to find out the cost of 20 pens when 1 pen consist up of $20 :

→ One dozen pen costs = $20

→ Then, 20 pens costs = $?

Now, we will have to find the cost of 20 pens here –.

→ cost of 1 pen = One dozen pen/no.'s

→ cost of 1 pen = 20/12

Now, cost of 20 pens = 20/12×20 = 100/3

→ 100/3 = 33.33333...

Hence, cost of 20 pens = Rs.33.333333……✔️

Answer 2

Step-by-step explanation:

cost of 12 pens = 20

cost of a pen = 20/12

cost of 20 pens =

$\frac{20}{12} \: \times 20 = \\ \frac{100}{3} \: \: = 33 \times \frac{1}{3}$

or 33.333...