 <translate> Gwendolyn just brought a book from the library, having 20 paragraphs per page, and since the book has 50 pages, the number of paragraphs in the book is 50 * 20 = 1000 paragraphs. If each paragraph has 10 sentences, the book's number of sentences is 1000 * 10 = 10000 sentences. Since Gwendolyn can read 200 sentences of a book in 1 hour, she will read 10000 sentences in 10000 / 200 = 50 hours. So the answer is 50. <yor> Gwendolyn ṣẹ̀ṣẹ̀ mú ìwé kan wá láti ibi ìkówèésí, ìwé náà ní ìpínrọ̀ ogún lójú ìwé kọ̀ọ̀kan, àti pé níwọ̀n bí ìwé náà ti ní ojú ìwé àádọ́ta, iye ìpínrọ̀ inú ìwé náà jẹ́ 50 * 20 = 1000 ìpínrọ̀. Bí ìpínrọ̀ kọ̀ọ̀kan bá ní gbólóhùn mẹ́wàá, iye gbólóhùn tó wà nínú ìwé náà yóò jẹ́ 1000 * 10 = 10000 gbólóhùn. Níwọ̀n bó ti jẹ́ pé Gwendolyn lè ka gbólóhùn igba nínú ìwé kan láàárín wákàtí kan, ó máa ka gbólóhùn ẹgbàágbèje láàárín wákàtí márùn-ún. Nítorí náà ìdáhùn náà ni 50. 