Question

if 12 books cost rupees 90 then the cost of 15 books is​

Answer 1

12 books cost ₹90

15 books cost ₹ {(90/12)}×15 or ₹112.50

Answer 2

Answer:

12 book cost = 90 rupees

1 book cost = 90/12

So , 15 book cost = 15×90/12

= 5× 90/4( by dividing

3)

= 450/4

= 112.5 rupees.