**Answer:**

Average speed in km / h = 2.7 km/h

**Step-by-step explanation:**

**Given:**

Total distance = 54,000 m

Total time = 72,000 sec

**Find:**

Average speed in km / h

**Computation:**

**Average speed = Distance / Time**

Average speed = 54,000 / 72,000

Average speed = 0.75 m/s

**1 m/s = 3.6 km/h**

So,

Average speed in km / h = 0.75 x 3.6

**Average speed in km / h = 2.7 km/h**

**Answer:**

**Step-by-step explanation:**

~

I don't know, but I think we/you have to divide 5 into 6. If it is wrong, then i'm so sorry.

50mph for 1.5 hr

50 miles = 1 hr

25 miles = .5 hr

so that makes 75 miles so far

70/2 = 35 = .5 hr

75+35

110 miles

Juan drove 110 miles for a total of two hours