two cars driven by A and B they were 590 miles apart and they drove towards each other. A's car has traveled 20 mph 4 hr/day....for 5 days when it has met B's car. If B had driven 3 hr/day for 5 days what was B's speed??
A has driven 20 hours at 20 mph = 400 miles. The total miles A and B travel must be 590, so B
must travel 190 miles. B travels 15 hours at some speed X. Hence 15X = 190, X = 190/15 = 12.66666...
mph.