Question

1)The cost of 12 pens is ` 780. What will be the cost of 15 such pens?​

Answer 1

Cost of 12 pens = ₹780

Cost of 1 pen = ₹780/12

= ₹65

Hence, cost of 15 pens = ₹65 × 15

= ₹975

Answer 2

12 = 780

1= 780/12 = 65

1 pen = 65

15 = 65×15

15 pen = ₹975