A girl can finsh a book in 25 days if she reads 18 pages of it every day. How many days will she take to finish it .If she reads 15 pages every day?

Answer

To solve the problem step by step, we will use the unitary method to find out how many days the girl will take to finish the book if she reads 15 pages every day.

### Step 1: Calculate the total number of pages in the book.
The girl can finish the book in 25 days by reading 18 pages each day.

Total pages in the book = Number of days × Pages read per day
Total pages = 25 days × 18 pages/day = 450 pages

### Step 2: Determine how many days it will take to finish the book if she reads 15 pages each day.
Now, we need to find out how many days it will take her to read 450 pages if she reads 15 pages each day.

Number of days = Total pages ÷ Pages read per day
Number of days = 450 pages ÷ 15 pages/day = 30 days

### Conclusion:
If the girl reads 15 pages every day, she will take 30 days to finish the book.

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