Answer:
6 hours 15 minutes, or 6.25 hours
Step-by-step explanation:
We assume Hank reads at a constant rate. His reading time will be proportional to the number of pages.
Proportion
We know that 15 minutes is 1/4 hour, so the proportion can be written ...
hours/pages = (book hours)/(250 pages) = (1/4 hour)/(10 pages)
Multiplying by 250 pages gives ...
book hours = 250(1/4 hour)/10 = 25/4 hour = 6 1/4 hour
It will take Hank 6 1/4 hours to read the book.
