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Tai Yuan City2010-01-29 06:02:05 +0000 #1
A, B and two trains from the A, B two relative out for the first time A to 75 km away from the encounter after encounter to move forward to reach the destination return immediately after the second encounter in the From B to 55 km and seeking A, B the number of kilometers away from the two places?
Zhang days package2010-01-29 06:09:36 +0000 #2
AB first encounter of the two vehicles were a full-line, A car dealers had a second encounter 75 kilometers

AB 2 lines of the three cars were full, A car Bank of 3 75 km, that is, 75 × 3 = 225 km, but also a whole more than 55 kilometers

Therefore, the distance between A and B is

75 × 3-55 = 170 (km)

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