since time = distance/speed, if the speed was x,
168/(2x) = 168/x - 3
x = 28
A long distance trucker traveled 168 miles in one direction during a snow storm.
The return trip in rainy weather was accomplished at double the speed and took 3 hours less time.
What is the speed going?
2 answers
snow storm speed --- x mph
rain storm speed ---- 2x mph
168/x - 168/2x = 3
times 2x
336 - 168 = 6x
x = 168/6 = 28
So he went 28 mph in the snow storm and 56 mph in the rain
check:
snow: 168/28 = 6
rain: 168/56 = 3 , so 3 hours less than in the snow
rain storm speed ---- 2x mph
168/x - 168/2x = 3
times 2x
336 - 168 = 6x
x = 168/6 = 28
So he went 28 mph in the snow storm and 56 mph in the rain
check:
snow: 168/28 = 6
rain: 168/56 = 3 , so 3 hours less than in the snow