12 1/2, 12.09, 12 2/5, 12.8 greatest to smallest

New Time taken by Max to cover the same route = 2.8 hours

Step-by-step explanation:

Time taken by Max to cover a certain distance = 3.5 hours

Walking rate of Max to cover the distance = 2.4 miles per hour

Let the distance of the route = x miles

Now, Distance = Time × Speed

⇒ Distance of route = 3.5 × 2.4

⇒ Distance of route = 8.4 miles

Now, New speed of Max = 3 miles per hour

So, Distance = New Speed × Time

⇒ 8.4 = 3 × Time

New Time taken by Max to cover the same route = 2.8 hours