Posted by Steph on Wednesday, September 26, 2012 at 11:43am.
v(A) • (t+0.5) =v(B) •t
0.5•v(A) = (v(B) –v(A)) •t
t= 0.5•v(A) /(v(B) –v(A)) =
=0.5•100/40=1.25 h
s=v(B) •t=140•1.25=175 km
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