Question

If the cost of 20 books is 180,how much will 15 books cost.​

Answer 1

Answer:

hmmm

Step-by-step explanation:

Here is you answer

Construction:

Step I: Draw OR = 4.5 cm

Step II: Draw two angles of 105° each at O and R with the help of protactor.

Step III: Cut OM = 6 cm.

Answer 2

Cost of 20 books =180

Cost of 1 book=180÷20=9

Cost of 15 books=9×15

So, cost of 15 books =9×15=135