Coral reads36 pages of three hours at this rate how long will it take Carly to read a book with 180 pages

Question

 Carla rates 36 pages in three hours at this rate how long will it take Carly to read a book with the 180 pages 

Answer 1

36 pages   =    180

3 hours               x

cross multiply    36x =540

divide both sides by 36  (36pages)x = 540hours

                                          36pages      36

x=15 hours