Question

pls pls answer with explanation​

Answer 1

Step-by-step explanation:

Let the total number of pages in the book be x.

Therefore,

Pages read on first day = $\frac{2}{5} x$

Pages read on second day = $\frac{2}{5} x+ \frac{2}{5} x\times\frac{1}{3}\\</p><p>=\frac{2}{5} x+ \frac{2}{15} x\\</p><p>=\frac{6}{15} x+ \frac{2}{15} x\\</p><p>=\frac{8}{15} x$

Number of pages left = 15

Total pages $=\frac{2}{5} x+\frac{8}{15} x+15\\</p><p>\therefore x = \frac{6}{15} x+\frac{8}{15} x+15\\</p><p>\therefore x = \frac{6+8}{15} x+15\\</p><p>\therefore x = \frac{14}{15} x+15\\</p><p>\therefore x - \frac{14x}{15} =15\\</p><p>\therefore \frac{15x-14x}{15} =15\\</p><p>\therefore \frac{x}{15} =15\\</p><p>\therefore x = 15 \times 15\\</p><p>\huge \fbox {\therefore x = 225}$

Hence, total number of pages in the book is 225.