A boy read 3/8 th of a book on one day and 4/5 th of the remainder on another day. If there were 30 pages unread, how many pages did the book contain?

প্রশ্নঃ A boy read 3/8 th of a book on one day and 4/5 th of the remainder on another day. If there were 30 pages unread, how many pages did the book contain?