Question

cost of 12 books each contaning 250 pages is ₹ 180 . find the cost of 20 if each contanins 200 pages .​

Answer 1

Correct Question:

The cost of 12 books each containing 250 pages is ₹ 180. Find the cost of 20 books if each contains 200 pages.

Answer:

The cost of 20 books each containing 200 pages is ₹ 240

Step-by-step explanation:

Given :

The cost of 12 books each containing 250 pages is ₹ 180

To find :

the cost of 20 books each containing 200 pages

Solution :

First, let's find the cost of one book.

cost of 12 books is ₹ 180

cost of one book = ₹180/12

cost of one book = ₹ 15

Each book contains 250 pages.

Hence, 250 pages cost ₹ 15

Now, we have to find the cost of one page.

Cost of one page = ₹ 15/250

Cost of one page = ₹ 3/50

We have to find the cost of 20 pages each containing 200 pages.

One book contains 200 pages

➙ Cost of one page = ₹ 3/50

➙ Cost of 200 pages = 200 × ₹ 3/50

➙ Cost of 200 pages = ₹ 3 × 4

➙ Cost of 200 pages = ₹ 12

➙ Cost of one book = cost of 200 pages = ₹ 12

➙ Cost of 20 books each containing 200 pages = 20 × ₹ 12

➙ Cost of 20 books each containing 200 pages = ₹ 240