Question

If the cost of 20 books is rs 180 how much will 15 books cost

Answer 1

Answer:

135

Step-by-step explanation:

cost of 20 books=180

cost of 1 book=180/20=9

cost of 15 book=9*15=135

Answer 2

Given:

The cost of 20 books is Rs 180.

To find:

The cost of 15 books.

Solution:

The cost of 15 books is 135 Rs.

To find the answer, we will follow the following steps:

First of all, we will find the cost of 1 book.

So,

As given, we have,

The cost of 20 books = 180 Rs.

So, the cost of 1 book

$= \frac{180}{20}$

$= 9 \: Rs.$

Now,

The cost of 15 books

$= 15 \times 9$

$= 135 \: Rs.$

Hence, 15 books will cost 135 Rs.