Question

A book has y pages. Haripriya read 20 pages of the book. How many more pages should she read to complete half the book?

Answer 1

Answer:

$(y - 40) \div 2$

Step-by-step explanation:

See image attached.

Answer 2

The more number of pages should she read to complete half the book is (y-40)/2.

Given:-

Total pages in the book = y

Pages read by Haripriya = 20

To Find:-

The more number of pages should she read to complete half the book.

Solution:-

We can easily find out the more number of pages should she read to complete half the book by following these simple steps.

As

Total pages in the book = y

Pages read by Haripriya = 20

Half the number of pages in the book (x) = Total / 2

$x = \frac{y}{2}$

Now, Half the number of pages in the book = pages Haripriya read + unread pages by Haripriya

On changing sides,

Unread pages by Haripriya = Half the number of pages in the book - pages Haripriya read

On forming the equation we get,

$pages \: left = \frac{y}{2} - 20$

$pages \: left = \frac{y - (20 \times 2)}{2}$

$pages \: left = \frac{y - 40}{2}$

Hence, the more number of pages should she read to complete half the book is (y-40)/2.

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