Answer:
11.25km
Step-by-step explanation:
9km in 1 hour and 30 minutes is 4.5km in 45 minutes so the average of 18km and 4.5km is 11.25km.
What I always do to solve this, is find a common factor for each number first.
Usually 4 or 5 works best. I'll use 4.
4 goes into 80 20 times, which means that 4 = 5% of 80.
If 4 = 5%, and 48 = 12 x 4, then 48 must equal 60% of 80.
(Another way to solve this problem is: simplify 48 / 80. This simplifies to 3/5.
3/5 = 60%)!
73
you write 12 instead of b
= 6 feet