Xiao Ming reads a book. He reads (1/5) of this book on the first day, and reads 70 pages on the second day. At this time, the ratio of the number of pages he has read to the number of pages he has not read is 3:2 , How many pages does this book have?
小明阅读一本书，第一天看了这本书的(1/5)，第二天又看了70页，这时已看过的页数与未看过的页数比是3：2，问这这本书一共有多少页？
<result>75</result>