Art and Bob are 49 km apart and start moving toward each other.If Art is moving at 20 km per hour and Bob is moving at 15 kmper hour, how long does it take for them to meet?
a) 60 min
b) 49 min
c) 72 min
d) 84 min
e) 96 min
Solution:
Let x = the travel time. Then. Thus it takes 7∕5 hours or 84 minutes forthe cars to meet.
. Thus it takes 7∕5 hours or 84 minutes for
the cars to meet.