math
posted by lina .
oliver can jog about 3 times as fast as he can walk. If his average walking rate is one mile in 20 minutes, about how far could he jog in 2 hours?

walking rate = 1/20
jogging rate = 3times or 3miles/20 minutes
2 hours = 120 minutes
Can you finish from here? 
I'm not getting it yet?

you can cover 3 miles every 20 minutes
You are walking for 12o minutes.
3 miles/20 minutes = x miles/120 minutes.
The denominator of 120 is 6 times bigger than the denominator of 20.
so you should go 6 times farther. 
so she could go 40 miles in 2 hours because 120/3=40

he**

No wait is it 18 miles?

18 miles is right.