Question

at a shop ,12 pens 120.find the cost of 20 pens
​

Answer 1

Step-by-step explanation:

12pens=120

20pens=??

1pen =120÷12

1pen=10

20 pen =20×10

20pens =200

Answer 2

Answer:

Cost of 20 pen is 200rs

Step-by-step explanation:

Given that

cost of 12 pens is 120

To find

cost of 20 pen

Solution

As cost of 12 pens given from this we can determine cost of 1 pen as

$cost \: of \: 1 \: pen = \frac{120}{12}$

by divide we get

$cost \: of \: 1 \: pen = 10rs$

now

$cost \: of \: 20 \: pen = 20\times 10$

by multiplication we get

$cost \: of \: 20 \: pens = 200rs$