SOLUTION: A long distance trucker traveled 144 miles in one direction during a snow storm. The return trip in rainy weather was accomplished at double the speed and took 4 hours less time.

Question 457889: A long distance trucker traveled 144 miles in one direction during a snow storm. The return trip in rainy weather was accomplished at double the speed and took 4 hours less time. Find the speed going.
Found 2 solutions by josmiceli, mananth:
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
You need 2 equations: 1 for going
and 1 for the return trip
going:

(1)
returning:
(2)
From (1):

Substitute this into (2)
(2)
(2)
(2)
(2)
The speed going was 18 mi/hr
check answer:
(1)
(1)
and
(2)
(2)
(2)
OK

Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
d=144
speed outward= xmph
return speed = 2x mph
time outward = 144/x
time return = 144/2x
144/x-144/2x=4
lcd=2x
288-144=4*2x
144=8x
x= 18 mph speed out ward
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