Respuesta :

Answer:

3 hours

Step-by-step explanation:

20 ÷ 5 = 4 mph

12 ÷ 4 = 3 hours

hope this explanation makes sense! :)

Answer:

9 hour

Step-by-step explanation:

sara hikes 20 mile in 5 hour

then, sara takes 5\20 hour to hike 1 mile

again if she hike 1 mile in 5\20 hour

then she to hike 12 mile she takes 5x12\20 = 9 hour