A long distance trucker traveled 224 miles in one direction during a snow storm. The return trip in rainy weather was accomplished at double the speed and took 4 hour less time. Find the speed going.

The speed going was ? mph.

Question

A long distance trucker traveled 224 miles in one direction during a snow storm. The return trip in rainy weather was accomplished at double the speed and took 4 hour less time. Find the speed going.

The speed going was ? mph.

anonymous · Answer

remember distance = speed times time, so time T = distance D/speed S

time outbound T = 224/S

inbound T-4 = 224/2S

Solve simultaneous equations by substitution to get S

amistre64 · Answer

i dint do it right lol

amistre64 · Answer

st = 224; t = 224/s

2s(t-4) = 224

2st -2s4 = 224

2s(224)
------- - 8s = 224
    s

448 - 8s = 224

224 = 8s..... t=8

s = 28 going

amistre64 · Answer

:)  when you double the speed; you half the time  in the same distance...