We have to try converting every unit to one unit, so we can easily find the difference in lengths. For this example, let’s take m (meters) as our unit. (You could also convert everything to yards, miles or kilometers).
Monday:
Let’s first convert miles to meters. 1 mile = 1,609.344 meters,
so 10.6 miles = 1,609.344 * 10.6 = 17,059.046 meters
Tuesday:
Next, we have to convert km to m, and 1 km = 1000 m
So, 17.02 km = 17.02 * 1000 = 17,020 meters
Wednesday:
The answer is already in meters, so there is no need to convert.
Thursday:
We can convert yards to meters, and 1 yard = 0.9144 meters, so 18,603 yards = 0.9144 * 18,603 meters = 17,010.583 meters
We can then arrange everything from biggest to smallest:
17,059.046 > 17,020 > 17,012 > 17,010.583
So the longest length is 17,059.046 meters, which Rocco ran on Monday.
So Rocco ran the furthest on Monday.