Question

After reading 7/9 of a book, 40 pages are left. How many pages are there in the book?​

Answer 1

$\huge\bm{\mathfrak{Hey \:Mate}}$

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➡️Let the total number of pages be x

➡️given:

$\frac{7}{9} + 40 = x$

➡️no of pages he read

$= \frac{7}{9}$

➡️no. of pages left

$\frac{2}{9 } \: \: \: \: or \: \: \: \: 40$

                      

➡️sol

$\frac{2}{9} = 40pages$

$\frac{1}{9} = \frac{40}{2} \\ \\ = 20pages$

⚫so, 

➡️no. of pages in the full book

 

$= 20 \times 9 \\ \\ = 180 \: \: \: pages$

❤️ ❤️ ❤️ ❤️ ❤️ ❤️ ❤️ ❤️ ❤️ ❤️ ❤️ ❤️ ❤️

#BEBRAINLY ✌️

                                             

Answer 2

$<b><u>Given :-</u></b>$

Part of book completed = $\frac{7}{9}$

Remaining pages = 40

$<b> Let the total number of pages in the book be x </b>$

$\rule{330}{1}$

$<b><u> To Find :-</u></b>$

Total number of pages in the book

$\rule{330}{1}$

Part of book remaining = 1 - $\frac{7}{9}$

= $\frac{2}{9}$

Number of pages in the book :

⇒ $\frac{2}{9}$ of x = Number of remaining

⇒ $\frac{2x}{9}$ = 40

⇒ x = $\frac{40 \: × \: 9}{2}$

⇒ x = 180 pages

$<b>•°• Number of pages in the book = 180 pages$