Question

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

Answer 1

Answer:

cost of 20pens =180

cost of one pen=180/20=9

cost of 15 pens=9×15=135

Answer 2

Answer:

cost of 20 pens=180

cost of 15 pens=(15*180)/20=105 ruppees