Question 287869
What is a one minute hill?
Do you mean one mile hill?
r*t=d
3x*t=1
x*(20-t)=1
t=5 x=1/15
3/15*5=1
1/15(15)=1
5 minutes going down and 15 going up
1/5 mph going down and 1/15 going up the hill.