SOLUTION: Palmer's average running speed is 3 Kilometers per hour faster than his walking speed. If Palmer can run around a 20-Kilometer course in 2 hours, how many hourse would it take her

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Question 446364: Palmer's average running speed is 3 Kilometers per hour faster than his walking speed. If Palmer can run around a 20-Kilometer course in 2 hours, how many hourse would it take her Palmer to walk the same course?
I NEED TO SEE THE WORK ON HOW YOU GOT THE ANSWER!!
Found 3 solutions by mananth, ikleyn, josgarithmetic:
Answer by mananth(16949) About Me  (Show Source):
You can put this solution on YOUR website!
walking speed =x
running speed = x+3
d=rt
20=(x+3)*2
20=2x+6
20-6=2x
14=2x
x=7 kmph running speed
so walking speed = 4 kmph (7-3)
d=rt
d=20
r=4
20=4*t
20/4=t
t= 5 hours walking time for 20 km

Answer by ikleyn(53427) About Me  (Show Source):
You can put this solution on YOUR website!
.
Palmer's average running speed is 3 Kilometers per hour faster than his walking speed.
If Palmer can run around a 20-Kilometer course in 2 hours, how many hours would it take
highlight%28cross%28her%29%29 for Palmer to walk the same course?
I NEED TO SEE THE WORK ON HOW YOU GOT THE ANSWER!!
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


        (1)   The solution in the post by @mananth is  ABSOLUTELY  WRONG.

        (2)   This problem is  PRIMITIVE  at the level of  4th or  5th grade student:  it is not an  Algrbra
                or a  Pre-algebra problem - - - it is an  Arithmetic problem. 


          Step by step solution


(1)  the running speed is  20%2F2 = 10 kilometers per hour, or 10 km/h.


(2)  The walking speed is 3 km/h slower, so the walking speed is 10-3 = 7 km/h.


(3)  Hence, the time for Palmer to walk the 20 km course is  20%2F7 = 26%2F7  hours.


ANSWER.  The time for Palmer to walk the course is  26%2F7 hours, under given conditions.

Solved completely at the Arithmetic level.



Answer by josgarithmetic(39702) About Me  (Show Source):
You can put this solution on YOUR website!
Run speed is 10 kilometers per hour and walk speed is 7 kilometers per hour.
From that you only need to know RT=D.