Question

If the cost of 20 pens is Rs. 180, calculate the cost of 15 pens?​

Answer 1

Answer:

Rs.135

Step-by-step explanation:

cost of 20 pens=180

cost of one pen= 9

so cost of 15 pens=9×15=135

Answer 2

cost of 15 pens is 15×4= 60