Passenger train speed + 50 mph
Freight train speed = 34mph
V(passenger) = V(freight) + 16mph
Vp x Time = 250mi.
Vf x Time = 170mi.
therefore...
a. [Vf + 16] x T = 250
b. Vf x T = 170
Subtract b. from a.
16T = 80
Time = 5 hours
Vp = 250/5 = 50 mph
Vf = 170/5 = 34 mph
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they were looking for a faster way to Asia, to trade for spices and etc.
to help the black slaves escape faster
because they can get to asia faster
it made communication easier, and faster.
Becuase of the gin it was much faster to pick to the cotton