SOLUTION: Palmer's average running speed is 3 kilometers per hour faster than his walking speed. If Palmer can run around a 30-kilometer course in 4 hours, how many hours would it take for P

Algebra ->  Expressions-with-variables -> SOLUTION: Palmer's average running speed is 3 kilometers per hour faster than his walking speed. If Palmer can run around a 30-kilometer course in 4 hours, how many hours would it take for P      Log On


   

Question 312393: Palmer's average running speed is 3 kilometers per hour faster than his walking speed. If Palmer can run around a 30-kilometer course in 4 hours, how many hours would it take for Palmer to walk the same course? (Round your answer to two decimal places.)
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
R-running speed
W-walking speed
R=W%2B3
.
.
.
Rate*Time=Distance
R%2A4=30
R=7.5
W=R-3=4.5
Time=Distance/Rate
T=30%2F4.5=20%2F3 hr
To two decimal place, T=6.67 hr.