Question

12notebooks cost rs.180.find the cost of 20 such notebooks

Answer 1

Cost of 12 books = 180 rupees.

We can find the cost of 1 book now.

Cost of 1 book = 180/12=15

Now:

Cost of 20 books = 20(15) = 300.

Therefore 20 such books would cost 300 rupees.

Answer 2

Cost of 12 notebooks = ₹180
Therefore,cost of 1 notebook = ₹180÷12
= ₹15
Cost of 20 notebooks = ₹15×20
=₹300
Therefore cost of 20 notebooks =₹300