Question

During a rain storm, the level of a river rose 1 1/4 inches in 4 1/2 hours. How many inches did it rise in one hour?

Answer 1

@Directrix

Answer 2

(1 1/4) / (4 1/2) = x / 1 --- 1 1/4 inches in 4 1/2 hrs = x inches in 1 hr
change mixed numbers to improper fractions
(5/4) / (9/2) = x/1
cross multiply
(9/2)x = 5/4 -- divide both sides by 9/2
x = (5/4) / (9/2)
x = 5/4 * 2/9
x = 10/36 which reduces to 5/18
so it rose 5/18 of an inch in 1 hr

Answer 3

@rishavraj