Question

Cost of 1 notebook is 15. Find the cost of 9 such notebooks?​

Answer 1

Answer

Its answer is 135.

Explanation

1 book cost is 15

then,

9 book Cost=9×15=135.

Answer 2

❥ Given :-

• Cost of 1 notebook = 15₹

❥ We need to find :-

• Cost of 9 such books = ?

❥ Solution :-

By the given information ,

Cost of ‘n’ books = n × cost of each book

Substituting ,

• n → no. of books = 9 books
• Cost of each book = 15 ₹

We have ,

⇒ Cost of 9 books = 9 × 15₹

⇒ Cost of 9 books = 135 ₹

Note :- The given formula is only for the given question .

Hence , cost of 9 books equal to 135 ₹