SOLUTION: ricky can ride bike 17km on his bike in the same lenght of time.he can walk 9km. if his speed is 4kph faster than his walking how fast does he walk ?

Question 1053201: ricky can ride bike 17km on his bike in the same lenght of time.he can walk 9km. if his speed is 4kph faster than his walking how fast does he walk ?

Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Ricky can ride bike 17km on his bike in the same length of time.
he can walk 9km.
if his speed is 4kph faster than his walking how fast does he walk ?
:
let w = his walking speed
then
(w+4) = his biking speed
:
Write a time equation; time = dist/speed
=
cross multiply
17w = 9(w+4)
17w = 9w + 36
17w - 9w = 36
8w = 36
w = 36/8
w = 4.5 km/hr is his walking speed
:
;
We can confirm this solution by finding the actual times
9/4.5 = 2 hrs
17/8.5 = 2 hrs
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