<PRE><B>Question 799169</B>
One bus left the city at 2:00PM and averaged 75 km/h. Another bus, traveling in the opposite direction, left the city at 5:00PM and averaged 85 km/h. At what time were the buses 705 km apart?

time difference between Bus I and Bus II = 3 hours

Bus I travels 75*3 = 225 kmin 3 hours

Total distance = 705

difference = 705-225=480

they are travelling in opposite directions

so add speeds 75+85=160 km/h

t= d/r

t=480/160 = 3 hours

Bus II starts at 5.00 pm
so they will be 705 km away at 8.00 pm</PRE>