Respuesta :
Answer:
20 minutes
Step-by-step explanation:
Darryl is reading a book at the rate of 4.5 pages per minute.
∵ the speed of reading book of Darryl in one minute = 4.5 pages
∴ it would take him to read 90 pages = [tex]\frac{\text{pages to read}}{\text{pages per minute}}[/tex]
= [tex]\frac{90}{4.5}[/tex]
= 20 minutes
It would take 20 minutes Darryl to read 90 pages.